My Horny Stepmother gets frisky and I Fuck her

I come home and my stepmother is very horny, dad hasn't had sex with her in a long time. He wants her stepson to fuck her and blow all his cum inside her. I fuck her in various positions, missionary, doggy style, sideways. In the end I can't resist the urge to cum in her big pussy. I hope I didn't get her pregnant and my dad doesn't find out about it.