on my first family vacation with my step sister after my parents remarried, we shared a room. my step sister, who has bad sleeping habits, exposed her bare breasts and panties while asleep. she rolled over and her body was right in front of me. i couldn't help but touch her, and before i knew it, i was roughly groping her. i thought she would be angry, but she was aroused instead. what started as light touching turned into her demanding my cock. before i knew it, we crossed the final line.