It was my first time having sex with my girlfriend! Or so I thought, but it was canceled when my sister came home. I was supposed to have sex today, but my sister locked on to me when she got home and secretly jerked me off even though she was right next to me. Since that day, whenever I go to her house, my sister always tries to seduce me. Panty shots! Chest shots! She uses her long legs to stimulate my dick. I'm such a useless person that I ended up having sex with my sister, but she doesn't know about it.