Fucked my stepsis like a slut

When walked in on my stepsister masturbating in a bathroom this shameless bitch said she wanted me to stay there and watch her. Yeah, right! Next thing I knew she was on her knees sucking my dick despite my non-stop protests. Fuck! We almost got caught that time and a few days later she got all flirty with me again and eventually I couldn't resist the temptation and just fucked her like a dirty slut and came all over her round bouncy ass. Damn!