As usual, comments and honest opinions are greatly appreciated.

If you didn't read the first parts you should, it will make more sense if you do.

When I woke in my bed Rita was staring back at me, like I was staring at her yesterday. She didn’t say a word, just looked at me and smiled.

“See something you like?” I asked coming out of my grogginess.

Still she said nothing, but ran her finger through my hair and kissed me lightly on the lips. I lay there for a while trying to get her to talk, but was having no luck, then it hit me.

“Don’t feel like talking huh, well I'll change that!”

I slipped under the covers and lay her flat on her back, and then I pulled her panties down and off. I kissed the toes on her left foot working my way up her leg. I kissed and licked the inside of her thigh, and when I got to her pussy I made sure I kissed around it while I blew hot air directly on her clit. She let out a few heavy moans but still said nothing. I then kissed the inside of her right thigh and made my way up her leg until I kissed the toes on her right foot. I made my way back to her pussy area, but still made no contact with it, instead, I kissed the strip of hair above her pussy, and then lifted her legs so I could lick the area between her pussy and ass. She was so horny the spot under her was already damp from her pussy leaking its juice. She even tried to force my head on her pussy a few times, each time I let her think she had me then I’d pull back real fast. Her moans were even louder now, but she continued to hold off, so I said to myself enough playing around. I reached up and pinched both her nipples between my fingers as I twisted them in place, while I used my nose to tickle the area above her clit and my tongue to draw circles around her pussy. Before I knew it she was wiggling around and moaning like crazy. Then just as I suspected would happen, she finally broke.

“Dammit Randy, I give! You win! I'll talk, please just stop teasing me and eat my pussy!”

Gotcha.

“I knew you’d see things my way,” I said from under the covers. I locked my hands on both of her thighs and dove head first into her wet pussy. Her early arousal made her taste even sweeter. The fruity taste of arousal tingled in my mouth as she jerked around at the slightest touch of my tongue. After a while she seemed to stop fidgeting so much and started to enjoy being eaten. I ran my tongue across every crevice of her pussy, sucking on her lips, stabbing her hole with my tongue, licking her clit, all which seemed to get a rise out of her.

“Yes Randy! Eat my pussy! Oh god! I fucking love your tongue! You make me feel so good!”

In truth, I enjoy eating her pussy as much as she enjoys being eaten, so much that I lost track of how long I was actually eating her out. I twisted her nipple with one hand and spread her lips apart with the other. I flattened my tongue and licked every bit of pink I could see. I then flicked on her clit and stuck a finger in her pussy as she locked her hand onto the back of my head and her legs shook.

“Yes, I’m gonna cum! Oh my god, oh my god, oh my god! Yes!”

Her orgasm shot out with so much force I had to back off at first, but when it slowed down I hopped back on her to drink as much as I could. When I finished I climbed up her still shaking body and planted kiss after kiss on her lips. She went back to saying nothing; she just mouthed “I love you” as she looked back at me. I wanted to stay there and cuddle with her for a while, but I knew soon it would be time to get up. No sooner than I said that there was a knock at the door.

“Ok, you two breakfast is on the table, get a move on,” Mom whispered through the door.

“Ok, Mom!”

We exchanged a few more kisses then headed to the bathroom to clean up, and went downstairs to breakfast.

Mom and Dad were dressed at the table when we sat down to eat, not too dressed up, but casual looking.

“I have to take your mom to her doctors appointment in a little bit, so I need you two to run to the store and pick up some food for the trip to the cabin,” dad said.

“Ok, Dad sure. What are we getting?”

He handed me a list that had to have at least 50 different things on it and $250.

“Whoa! We're only gonna be there for a few days!”

“You can never be too sure.”

Rita and I went over the list and decided best to go to Giant Eagle (self-checkout line). For about ten minutes we sat there making changes to the list until mom and dad got up to get ready to leave. We had gotten rid of a few things, but it was still a lot of food for four people.

“You should go get that stuff now before the stores get too crowded, you don’t want to be there all day,” Mom said on her way out the door.

“Remember to get everything on that list,” Dad said following mom out.

“Ok, Dad we’ll take care of it.” Rita yelled back.

We cleaned up, got dressed, hopped in the car and headed for the store.

When we got to Giant Eagle it was a little crowded, but not too bad. We grabbed two carts and went about picking out everything. Halfway through the list we split up so we could get done faster. When I finished grabbing my stuff I went to meet up with Rita and saw she was talking to some guy, naturally I got a little jealous. Unlike last time at the concert, I wasn’t gonna just sit back and do nothing, so I speed walked my cart over to where she was at. As I rounded the aisle corner my cart ran into another girls cart knocking some of her stuff on the floor.

“I’m so sorry, I wasn’t looking!” I apologized.

“No its ok I wasn’t looking either,” she replied.

I helped her pick up what fell out of her cart, when we looked at each other I realized it was Stephanie, one of the few female friends I had.

“Hey Randy! Haven’t seen you in a while!”

“Yea I know, it’s been what, two months now?”

“Something like that. You spend all your time with your sister, where is she anyway?”

“She’s here, were shopping for a family vacation were taking.”

We talked for a little while catching up and everything, a little flirting now and again, and she gave me her phone number and said call her whenever I wanted to stop by her house and hang out. We said goodbye to each other and went our separate ways, just about the same time Rita stopped talking to her guy. We met up and finished grabbing everything on the list and went to the self-checkout line. We bought everything, loaded up the car and started for home.

On the way home we had little small talk until my jealousy kicked in.

“So who was the guy you were talking to?”

“Some guy that wanted to get with me, who was that girl you were talking to?”

“That was Stephanie, you remember her.”

“Yea, I remember she likes you.”

“Did you notice how much were getting hit on now that were in a relationship? I mean when we were single, nothing, but now that were together, it’s constant.”

“Yea I did, and I noticed how jealous we both get,” she said rubbing my leg.

I looked over at her and she was biting her lip, the sexiest of all come-ons. I was getting so horny I was about to pull over and fuck her in the car, but then I remembered we just bought all that unnecessary stuff and it was crammed in the trunk and the back seat, thanks dad.

“I think you need to hurry up and get home,” she whispered in my ear.

We were only about two minutes from our house at the time, but I still sped home. Our parents were still gone, so we knew it was one of those appointments where they were doing body tests (mom had one every month) so we had a couple hours. We took everything in and put it in the proper place, but didn’t take anything out of the bags. We practically ran up to my room and stripped off our clothes as we hopped in the bed. For a while we were just kissing and feeling up each other, but neither of us was too big on foreplay at that moment.

“Ok Randy enough of that, just fuck me!”

Her tone surprised me a little, but turned me on even more. I turned her on her side and lifted her leg, slapped my cock against her pussy a few times and slid right into her.

I held her leg up as I pounded into her from the side, and squeezed her tit in my hand while I kissed her neck. She held her head up on her arm as she met my thrusts halfway, forcing a clapping sound to echo through the room. I sped up a little as my balls slapped against her pussy.

“Oh Randy fuck yes! Fuck me, fuck your sister! You love it don’t you? Ugh, ugh, ugh, yea just like that ugh! Oh baby I love your cock shoved in me! Please don’t stop!”

I kept up my pace for about five more minutes and directed her to get into the doggystyle position. I let my cock head poke her asshole a few times before she jumped forward and flipped on her back, covering her ass.

“What are you doing? I’m not ready for that yet, besides, as tight as you are in my pussy you might rip my ass apart!”

“Oh well, it was worth a try,” I thought. She then spread her lips apart with one hand and pulled me down to her with the other hand. We kissed as I guided my cock back to her pussy, and shoved it in full force. She screamed into my mouth but never broke the kiss, and then locked her arms and legs around my waist and pulled me towards her, and then let go, and pulled me towards her again, effectively fucking me while I lay there and did nothing. After a while I had to get back into it, so I interlocked our hands and raised them above her head on the bed, lifted my bottom half off the bed so she would have to let me go, and drilled her with everything I had. I lay my head next to hers and moaned into the pillow as she was screaming in my ear. She raked her toes lightly across my lower back and made me shiver, and at the same time she contracted her pussy around my cock and I had to stop because it made my cock too sensitive. I sat up on my knees and lifted her legs off the bed, with an arm holding each of her thighs, and then continued fucking her swollen pussy. A while later I thought I heard a noise in the house, so I slowed my pace so I could hear, but when I heard nothing, I went back to fucking her. About two minutes later I thought I heard something again, but I was too concentrated on Rita, big mistake. Not too long after there were three light knocks on my door then our dad barged in, with me still on top of Rita, were screwed.

“Randy do you know… what’s going on here?” He was staring right at me.

I looked down at Rita who lay there silent in shock, but I could hear her heart beating rapidly as my cock slowly deflated inside her. I looked back over at dad and he still had that same look on his face as he held the doorknob. I thought for sure he was gonna beat the crap out of me for violating his little girl. Since there was little we could do to rectify the situation, I decided to tell the truth before he did anything.

“Dad, I can explain,” I said scared outta my mind.

“What’s to explain, it’s pretty obvious,” he said as a smile slowly crept across his face.

Why was he smiling? Did he know about us? Who told him? Was he gonna try anything with Rita? I had a million questions in my head, but if there’s anything I learned from TV, it’s that you always let the other person talk first, before you fuck up and say something at the wrong time.

“I knew you were lying when you said you weren’t involved with anyone! Ha ha my sons a chip off the old block! I was beginning to worry about you!”

We were both dumfounded, but still aware of the situation, so we went along with what he thought was happening so he could leave.

“Umm dad can you… you know,” I babbled.

“Oh yeah yeah I’m leaving, just make sure you’re done before your mother gets back. Oh, have you seen Rita? Your mom said she borrowed her planner and it has all our insurance cards in it?”
Just then it occurred to us he thought I was having sex with a random girl and not my sister. I breathed a sigh of relief as Rita mouthed to me where the planner was.

“I think she went to a friend’s house, but she usually keeps stuff like that in her desk drawer.”

“Ok, your mom and I should be back in a little over an hour, which should give you and your lady friend plenty of time to finish up.”

“Ok dad, you can go now!” I said desperately.

He looked at me one more time, pumped his fist in the air while he cheered and left. A couple minutes later we heard him say he found the book, get in the car and drive off.

“What the hell just happened?”

“It seems that daddy thinks you have a girlfriend!”

“I do, the sexiest girl alive, who just happened to be my sister.”

Her face lit up as she rolled over so she was on top as my cock fell out of her, but was getting harder by the second. She stuck two fingers in her pussy and brought them down on my lips, when I sucked her fingers clean she stuck the same two fingers back in her pussy and this time sucked them herself. She ran her tongue over her lips in a clockwise motion (probably the sexiest thing she has done by far), grabbed my cock and sat down on it. She was bouncing up and down on me so hard I thought the bed would break.

“Seeing dad standing there with your cock still in me scared the hell outta me, but turned me on so much,” she said while riding me like crazy.

I grabbed her ass and helped her bounce on me, and then she pulled me up and kissed me hard on the lips. Just then I got an idea, I got up with me still inside her and walked over to my desk chair and sat down in it. The new feeling was incredible, I felt like I slid another inch or two inside her. She must have felt the same feeling because she rode me even harder than before.

“Mmmmm baby this feels so good, your cock is even farther in me! We should have done this… Oh fuck I think I’m cumming! Fuck me Randy, yes yes! I’m cumming! Oh goooooooooodddddddd!”

I held on to her and kept fucking as I felt my legs getting drenched with her juices. She had a look of ecstasy on her face as she went limp in my arms. I held her close to me as I thrust harder and harder into her. When she came back to reality she put her arms around me and stuck her tongue down my throat. The pressure was building up in me and I screamed to her I was cumming. She rocked her hips faster and told me to cum deep inside her. About two minutes later I pushed as deep into her as I could and emptied everything I had into her. When I finished cumming I leaned back in the chair to catch my breath, with Rita still straddling me as she fell forward onto me.

“We really have to start locking that door!” Rita joked.

I couldn’t help but laugh. It was a completely ironic situation. Every time we were found out, it was because we failed to secure the door, and yet were still making the same mistake.

“Yea we’ll have to be more careful, that could have ended in disaster, but we can worry about that later, we need to get cleaned up before they get back.”

“Yea you’re right, you put so much cum in me I don’t think I can get it all out! I'll get out what I can and run us a bath.”

“What are you crazy? What if dad comes back again?”

“Remember what you told him? I’m at a friends house remember? Besides, the door will be locked...