Every month Mom has what she calls her 'Girls' night in'. This is when she has a few of her friends round and they talk about stuff and drink wine. When this happens I always have to stay in my room out of their way.
Some time last year I started trying on some of her lingerie that I found in the laundry because I discovered it makes me really horny and I like to wear it and jack off. More recently I looked in her drawer and because she has so many things I started stealing stuff and wearing it under my clothes so I'd feel horny all day.
Anyway, in her most recent Girls' night in I was in my room. Under my clothes I was wearing a teddy that I'd got out of her drawer, and a garter belt and stockings I'd been wearing it all day. I was relaxing on my bed looking at a porno mag and getting ready to masturbate. I heard the conversation downstairs get louder and then I heard Mom coming upstairs and she came into my room. Luckily I hadn't taken my clothes off yet. She told me to come downstairs, so I went downstairs and on the tv screen was a video of me masturbating. I was so embarrassed.
She had the camcorder hooked up to the tv to show a video to her friends and she had to try each tape until she found the right one, but she found a video I'd made when I was messing about and had forgotten to erase it. She asked me to explain and I didn't know what to say, I was too embarrassed. She stopped the tape and her friend Sue shouted, saying she wanted to watch the tape. They'd all had a few glasses of wine and were a bit drunk, and another of her friends was also saying she wanted to watch it, so Mom sat me down next to them and rewound the tape and we all watched it. I was really embarrassed, but also kind of aroused at the same time. When the tape ended some of them applauded, and Sue, the loudest of them saw that I was pitching a tent and said she wanted me to do a live demonstration. I didn't want to do it, but Mom was already angry and she was like 'if my friends want to see you masturbate then you'll do it' and I had no choice so I agreed to do it.
I just stood there, then Sue said I had to 'get them off' so I started to undress, then I realised I was wearing Mom's lingerie under my clothes! She was already angry so I thought what the hell and undressed down to my... down to her lingerie. Mom was angry when she saw I was wearing her stuff but she started laughing, saying I looked funny. Sue cleared everything off the table and said I should lay on the table and masturbate there, so I lay on the table and pulled the crotch of the teddy aside and pulled out my 8' wang which was already semi-hard but it got erect pretty quickly. Sue said 'Wow!' which really turned me on and I started stroking it slowly, gradually building up speed while they all sat around on the sofa watching me. I've never seen women as wild as these except on the tv, their behaviour made me really horny and as I was close to orgasm Sue grabbed hold of my wang and started jerking it and I shot 5 or 6 loads high into the air, then she got tissues and helped me clean up.
Mom sent me back to my room saying I could keep the lingerie if I liked it so much.
Some of the experience was really embarrassing, but thinking about it now is getting me really horny that I hope it could happen again next month.