My younger sister used to be really hot and I used to jerk off fantasizing about her when I was younger. One morning I went into her room to wake her up and she said she was too ill to go out with her friends. She said she felt hot but cold at the same time.
I slipped my hand under her duvet to see if she had a fever, and I felt her back which felt very cool. I rubbed her up and down to try and warm her and she said it felt good. After a while I let my hand run down over her bum and panties and she giggled. I was getting very horny feeling her tight bum and soft skin so I carried on massaging her bum.
After a bit she began to wiggle about and when I slipped my fingers between the tops of her thighs she began to hump down into the bed. Then, she raised one of her legs and I fingered her pussy through her panties until she was gasping and wiggling some more.
Suddenly mum shouted it was time for breakfast, and I had to go. All day I stayed hard thinking about fingering her. When I got home she was laying on the couch in the front room, I went straight to the bathroom and checked out the laundry basket and found her little white panties I wrapped them around my cock and jerked off into them, and saved them so I could do it later, too.