When I was 21 and my sister was 24 we used to share a bed (I know its not common for 21 and 24 y.o brother sister but we did). I used to watch too much porn and read sex stories. I started reading i****t stories and it changed the way I thought about my sister. I started to see her like other girls and I wanted to have sex with her. I tried to seduce her by showing her my bulge though the pants and by playing with my dick when she was around. I used to rub myself with her back and then pretend like it was an accident. I started touching her while she slept. I started by creasing her tits and her ass. Within a couple of days I grew bolder and bolder and one night I put my hand inside her shirt and pressed her boobs I played with her erect nipples (over the bra) she was awake but she kept her eyes closed. Her facial expression showed that she was annoyed but she did not open her eyes. She took my hand out of her shirt and turned her back towards me. I started rubbing her pussy and surprisingly she was wet . I took out my dick and started rubbing on her pussy (through her trousers) but she pushed me away. Then I went to bathroom, jerked off and felt asleep. She told it to mom and then mom separated our beds.