Having sex with my stepsister and her friend - SisLovesMe

I was trying to learn, but I kept hearing noises from my sister's room. I went to see what's happening, and I saw my stepsis and her friend touching each other's tits and giggling. Seein them like that made me horny, so I got my dick out and started jerking off. They saw me, so I had to run from her room. The next day the girl decided to share my cock and made a terrific blowjob. When I ran into them playing in the bedroom the 3rd time, the horny girls invited me to join them. I fucked both my slutty sister and her friend so hard that they screamed with pleasure.