Grinding

I read the story by Tina called nighttime where she likes to grind on her duvet. When I was younger, my cool aunt gave me some thong knickers which made me feel really horny. My bare bum rubbing my tight school trousers and they were really tight over my puss. In bed at night I would bunch the duvet between my legs and thrust into it, the cool air on my bum cheeks making me feel really sexy. I think I threw a few away as they got really wet and I was scared what mum might say.