Serena was moaning and when he smacked her butt she would yelp in pain from the smack. she was having too much fun to stop him thou she would just take what he did to her. the more he thrust the more she got close.  She soon let out a scream and went stuff as she came all over his dick.  she was breathing hard as she had just had great sex. she looked over to Allison and grinned and said "your turn to let him due you and while he does I'm going to play with ya".