I was walking through the living room when I noticed my step sister Lilly was on her phone. She was looking super cute and was really focused so I didnt want to interrupt her. As I walked by, she looked up at me and said something that caught me off guard. It seemed like she was talking on an audio message but it sounded like she was saying "I wish my step brother would fuck me." This really made me feel uncomfortable because I knew she wasnt supposed to be talking about fucking her step family member so I left the room as soon as possible. When I got back to my room, I noticed Lilly had followed me and was waiting for me in my bedroom. She explained that she didnt mean what she said earlier. Then I felt better because I knew it was just a joke. But then Lilly started getting really flirty and saying that it would be okay if she fuck me even though we are step brother and sister. She took off her shirt and showed me her perfect tits. I wasnt sure what to do but the fact is I was so horny, my cock got hard just from looking at my big sexy 18 year old step sisters amazing natural breasts. She asked if she could suck my dick and I said sure so we switched spots and she started giving me one of the best blowjobs of my life! Lilly even took a huge load in her mouth at the end of the blowjob so she could swallow it all down.
