Fucking my dads best friend

You come round to see your best friend, but his daughter tells you he's out. She asks for your help as she dropped something behind the sofa... but catches you looking at her ass. Instead of being disgusted though, she seems turned on? She teases you with her big ass before pulling down her panties and fingering her wet pussy. She finally persuades you to fuck her quickly before her dad gets home. She climbs on top of you and rides you cowgirl and reverse cowgirl, and finally begs you to cum in her. She hears her dad get home and quickly throws her dress on before he walks in. I wonder if he noticed the cum dripped on the sofa.