Just over a week after I watched my sister Maddy masturbating, and I've cum in her panties's everyday thinking about my sister, and nobody was talking about what Dad did with us. It was now the weekend. My dad, as usual, was at the football, my sister was hanging out at the mall with friends, and my mum was going to do the weekly food shop.
I watched out of my bedroom window, waiting for my mum to leave, so I would have the house to myself. As soon as I saw her getting in the car, I jumped up, grabbed my sister's well-used panties, and rushed to the family bathroom. Once I was in there, I quickly stripped off sweat top and joggers until I was totally naked.

I moved in front of the full-length mirror, looked at my body. I didn't have the most sporty body, but I was still in shape, and my four-inch limp cock looked good. As I looked at myself, I slowly ran my hand over my body, squeezing and playing with my nipples. I watched my cock start to twitch, so I lowered my other hand down and started to play with my limp cock.

As I was playing, I watched myself grow from four to very nearly seven inches, and the more I watched and played the more horny I became, until my foreskin had pulled back so I could see my big purple mushroom and my veins running the length of my shaft.

I grabbed my sister's cum-filled cotton panties and wrapped them around my stiff shaft. I slowly started rubbing them up and down my stiff cock, thinking about how sexy my sister looked naked and masturbating on her bed. I was in heaven.
Suddenly, the bathroom door flew open. It was my mum; she burst in, saw me and said, "Sorry, didn't know you were in here. Sorry, I really needed to pee. Don't worry, I'm not looking."

She rushed over to the toilet, lifted her skirt, dropped her knickers, and sat down. As I heard her start to pee, I glanced over and saw my mum looking at her feet where her fancy dark blue knickers were around her heels. I was frozen to the spot with my hand still wrapped around my sister's panties, with pre-cum on the tip of my swollen cock, then she spoke, "You should really shut and lock the door when you're in here."

"Sorry, Mum, I didn't know you were back home."

As I spoke, she looked up at me. "What are you doing?

Oh my god, you dirty boy. No, No, No, are they your sister's school panties? Give them here now."

I was bright red and now quickly becoming limper until I was limper than I'd ever been before.

I passed the panties over to my Mum and said, "Sorry."

She sat looking at the now warm panties. "What have you done to them? They're so messy, you naughty boy. Get your clothes on and go unload the car."

I quickly grabbed my clothes and left the bathroom. I went and did as she asked, ensuring everything was put away just how she liked it.

Then I went back upstairs to find her. As I went into my parents' bedroom, I saw my mum on her bed with her skirt up, showing her curvy legs and dark blue knickers. Her blouse was open and her matching bra was on show, she looked so hot. She had her hand in her knickers playing with her bushy pussy. I turned to leave as quickly as I could, but she saw me and said, "Stop right there."

I stopped, and as I turned, I could feel my cock starting to grow again in my joggers.

"Now get out of those clothes."

I slowly started to take my sweatshirt off, but she shouted, "Quickly!"

So I stripped as fast as I could. I was now standing there shaking, and completely naked, with my now rock-hard cock pointing to the sky.

"Now come over here and remove my knickers, and show me what I caught you doing in the bathroom."

I walked to the bed and slowly pulled her knickers down her legs and unhooked them over her shiny blue heels. I took a step back and put them to my face; they were still warm, damp and smelled musky.

Then I lowered them to my cock and wrapped my shaft in them. I slowly started to stroke her knickers over my length while watching her fingering her wet pussy.

"Good boy, you look so big. How do Mummy's knickers feel on your big cock?"

"Much nicer than Maddy's cotton panties."

"Mmmm, I want you to make them messy for Mummy."

I started wanking faster. I was so turned on and knew it wouldn't be long before I came in my mum's knickers.

"Mum, I'm going to cum."

Mum sat up in front of me and started to remove her blouse and bra. This only fuelled my excitement, and as her saggy breasts fell from her bra, I shot my load into her soft, wet knickers.

"Good boy, that's a good load."

Then she got to her knees in front of me. She took her messy knickers off my still stiff cock and slid her mouth over my big purple helmet and sucked the last of my cum from me. Then she took the whole seven inches into her mouth, grabbed and squeezed my balls as she bobbed her head up and down my full length.

"Mum, that feels so good."

I put my hands on her shoulders as she slipped her hand off my balls, and between my legs till her finger was pushing against my asshole.

She then started to make a circular movement on my tight little starfish while sucking on me hard. Then, without warning, her finger entered me. The pain and pleasure made me scream, but she didn't stop fingering my ass until I came deep in her mouth.

After she had emptied my balls, she let me go and handed me her knickers and said, "Keep these till next week, and if you're good, we may try something new. Now off you go and remember, nobody needs to know."

I left her room, thinking, doesn't anyone talk in my family?