Since I was little, I've been secretly doing things with my sister that stop short of actual intercourse. However, recently, my sister has been insisting she wants to go all the way. I managed to convince her to settle for dry humping, but she wanted more stimulation and started fiddling with my dick in front of our parents, even going as far as dry humping inside her long skirt! The taboo of doing it in front of our parents made her even wetter than usual, feeling so good that I couldn't help but cum. Then, I just slid right in.
