I wanted to help my teen step sister dress better and be sexier without being half-naked. We went to her room and after I picked her some clothes to try on she got fully naked in front of me. I left the room and went downstairs to watch TV. After some time, my naughty stepsis comes and tries to say she's sorry for earlier. But as we were talking, she saw I had a boner, so she grabbed my dick and pulled it out. I was left speechless when she started sucking my dick. I didn't think my stepsister knows how to do a blowjob. When I asked if she wants to feel my dick inside her, she said yes, and I couldn't resist it. That was the moment my stepsis lost her virginity.