It was the end of fall. Sarah was now seven months pregnant and really starting to show. In two weeks, school would start again.

It was Saturday afternoon. I was out fishing, enjoying some alone time and thinking how great it was to have pussy waiting at home whenever I wanted it, even if it was my sister’s. As the sun started to set, I packed up and stopped to grab some beers and tequila. Sarah had rented a couple of movies, and I figured I’d get drunk and high since I hadn’t caught any fish.

When I rolled up to the apartment and walked in, I got a surprise. Sarah was sitting on the couch holding her belly, and next to her was my other sister, April. She had just turned 16 this year, a senior in high school. She was very athletic, at 5’1” with blonde hair, a small, tight ass, and she did cheer and dance.

“What are you doing here? What a great surprise!” I said.

“I came for the weekend,” she replied. That’s when I noticed her overnight bag on the floor next to the couch.

April asked, “What are you guys planning on doing tonight?”

Sarah piped up, “Let’s order pizza. I rented a couple of movies.”

I raised the bag with the beer. “Cool. I’ll run and get the pizza. Be back in about thirty minutes.”

I didn’t have a phone and was on a tight budget, so it was easier to just go get it. I shouted, “Anyone want to come with me?”

“I do,” April said quickly.

Sarah waved us off. “I’m staying here. This kid is moving around like crazy.”

We hopped in the truck, ordered the pizzas, then cruised the strip for a bit to see who was out. Thirty minutes later, we grabbed the pizzas and headed home.

We sat on the couch and put in The Last Boy Scout with Bruce Willis. About halfway through, Sarah got up for a pee break. That’s when April asked for a beer.

“Go ahead,” I told her.

She cracked one open. I was already drinking, and when Sarah came back, we both noticed her nipples poking through her tight red t-shirt, and they were wet.

Sarah looked down. “Fuck, I’m leaking milk.”

We laughed as she went to change and put on a bra with pads. We restarted the movie. I drank three beers and took a shot of tequila. There was one beer left, and April asked if she could have it.

“Yeah, go ahead.”

I took another shot of tequila and was feeling super relaxed. April was sitting in the middle of the couch, clearly feeling no pain. When the movie ended, we chatted about her plans for senior year and the future. I lit a joint by the window and smoked half before April asked for a couple of drags.

I teased her, “What happened to Miss goody-two-shoes?”

“Very funny, Dave. So can I?”

I didn’t care, so we finished the joint together.

She looked tired. Sarah was already in my bed, and I started worrying about how I’d explain why we slept together. But April flopped onto the couch like she owned it and passed out. Fuck it, I thought. I’ll come up with excuses later. I was buzzed and headed to bed.

Without thinking, I stripped completely naked like I usually did now and slipped under the sheets, snuggling up against Sarah. She was wearing an oversized T-shirt with no panties, as usual. I spooned behind her, my ass toward the wall, both of us facing the bedroom door where the fan was blowing. My dick and balls nestled into her ass crack and quickly got hard. Sarah started grinding back against me. This was our comfortable way to fuck now that she was bigger.

My rock-hard cock rubbed between her pussy lips, getting nice and lubed. Sarah reached down, rubbed her clit, then guided the head of my cock into her wet pussy and pushed back urgently. That was my signal. I started fucking her while she pushed back against me. We were both breathing heavily and moaning quietly.

Then I got that feeling, like someone was watching. I opened my eyes and saw a shadow by the door. I kept fucking Sarah, and she kept pushing back. Suddenly, the bedroom light flipped on. We both froze. You could hear a pin drop.

April stood there. “What the… you both sleep in the same bed? My God, that couch sucks.”

Sarah patted the bed. “Come here, sis. There’s room.”

April turned the light off. Sarah opened the sheet while I pulled out of her. April snuggled in with Sarah, and we all eventually fell asleep.

I woke up with a massive hard-on. I hadn’t finished earlier, so my cock was throbbing and pressed against my stomach. I scooted closer to Sarah, careful not to make any sudden movements. I reached over her hip, lifted her oversized t-shirt, and was surprised to feel panties. She must have put them on during the night.

I slid my hand inside her panties, found her slit, and started massaging her clit and running my fingers up and down. She was already getting wet. Sarah began moving and pushing back against me, which was my signal to continue. I pulled her panties to the side, lined up my cock, and thrust between her pussy lips while still rubbing her clit. She pushed back, meeting my hips with small, quiet movements.

My cock was soaked. I wanted inside her, but the angle and panties made it difficult. After a few attempts, I gave up on penetration and kept thrusting between her lips. She squeezed her thighs together perfectly, so the head of my cock rubbed against her clit with every stroke. I could tell she was getting close, and so was I.

A few more thrusts and she tightened up, shaking quietly. I pressed forward and came hard, shooting pulse after pulse into her panties. She was still trembling as I emptied the last of it. I pulled back, fixed her panties, rolled onto my back, and fell asleep again.

I woke up later to the smell of bacon and eggs. I threw on some underwear and walked out of the bedroom. Sarah was cooking.

“Where’s April?” I asked.

Sarah pointed toward the bathroom. Right then, April came out wrapped in a towel, looking fresh and super happy.

“Looks like someone had a great shower.” I laughed.

She smiled, gave me a hug, and a kiss on the cheek. “Bathroom’s all yours, bro.”

April went over and hugged Sarah and her belly. I headed into the bathroom to shower. When I turned on the water and took off my underwear, I noticed a pair of panties on the counter, ones I hadn’t seen before. They were dirty and what looked like dry cum. I picked them up, inspected them, smelled them… and tasted them. Definitely cum.

Holy shit.

The light went off in my head. These were April’s baby blue Victoria’s Secret panties. Was that her last night? Did she leave them here on purpose? My cock instantly swelled. I wrapped them around my shaft and started stroking while inhaling her scent. It didn’t take long. I held the crotch open and shot a huge load into them, spurt after spurt. My knees almost gave out.

What the hell did I just do? I thought. I set them down to clean later and got in the shower. When I got out, the panties were gone.

Oh fuck. Someone had been in here.

I wrapped a towel around my waist and walked out, expecting awkward looks, but nothing happened. April was giddy and chatty with Sarah. They were washing dishes and laughing.

“What’s the plan for the day?” I asked.

They answered at the same time: “Swimming at the lake!”

April jumped up in her towel (which barely covered her hips) and ran to her bag. I couldn’t help staring at her cute little ass. She bent over, and I saw those same baby blue panties hugging her puffy pussy lips, with a huge wet spot right in the middle. My cum was smeared all over her pussy lips. My cock started swelling again.

We got ready and drove to the lake. The girls went into the dressing room while I waited in my trunks. When they came out, the sight was incredible. Both wore two-piece bikinis. Sarah looked sexy with her pregnant belly, perky C-cup breasts, and glowing smile. April looked even tighter with toned abs, a cute muscular little ass, and a tiny top that barely contained her. They both noticed me staring.

“What’s going on, Dave? Why are you gawking?” they teased.

“Go ahead, I’ll catch up,” I said.

I watched their asses as they walked to the water, then jumped in myself to cool off and hide my growing erection.

When I came out, they had a towel ready for me. I lay down and soon felt two pairs of hands rubbing lotion on my back, giving me a full massage. Neck, shoulders, back, legs, and feet. I moaned in pleasure and nearly fell asleep.

A little later, I opened my eyes and watched Sarah giving April a massage. She worked April’s neck, shoulders, back, and then her tight ass. April was moaning softly. Sarah smacked her butt playfully. “God, you’ve got a cute ass, sis. I gotta go pee.”

As soon as Sarah left, April reached into her bag and pulled something out.

“Dave?”

“Yeah?”

“Did you like the show?” she asked with a grin. “Here, I got you something.”

I held out my hand. She dropped the baby blue panties into it. I turned bright red, quickly crumpled them, and stuffed them into my pocket.

April just smiled.

We spent the afternoon at the lake. Later, Sarah asked us to drop her off at Sally’s because her husband was supposed to call. April and I headed back to the apartment as it was getting dark.

Once inside, we chilled on the couch.

“What do you wanna do?” she asked.

“I don’t care. What do you wanna play?”

She smiled mischievously. “How about Truth or Dare?”

I grinned. “Okay, let me grab the tequila. It’ll make it more fun.”

I came back with the bottle. “Who goes first?”