The comparison: who blows and fucks better?

I'm currently introducing Sabrina to the whole porn thing and because we hang out and do so much together I like to call her my "little sister". I had someone over again who was also looking forward to getting to know my "little sister". When I left the room, Sabrina immediately took the opportunity to suck his cock. He wanted the comparison and also let me suck him and then us together. He also wanted to compare our fucking, so he took turns fucking us and squirting his cum on Sabrina's body.