Redhead Alex Tanners fucks her sister's boyfriend

Petite Alex Tanner's sister's boyfriend (complicated, I know) came over with a present for his girlfriend's birthday. Turns out she's not home, she went to a party with some guys and she's a big slut who's been cheating on him regularly. He's obviously upset and to calm him down cute redhead Alex has a great idea. How about her sucking his big dick and then fucking her tight pussy?