What Could Possibly Go Wrong if I Let My Stepson Help Me Masturbate?

It was one night of many, in which I thought I was alone in my apartment, so I walked in my underwear through the living room only covered by my navy blue nightgown, I was aroused that night and I decided to masturbate with a sex toy, but my surprise was to know that my stepson was in his room and he went out very silently to see what was happening when he heard my moaning and found me on the spot