New stepsister who is 18 years old moves in with me and catches me jerking off before she decided to fuck me

I am shocked that my freshman stepsis is masturbating and the resulting pathetic lovemaking. Her round and enormous butts make me sexually aroused also her pretty face. I fuck her in the missionary then I cum on her tits. Honestly it was just a gorgeous 18 year old getting a facial from her first time.