Cherie wants to surprise her step-son for his birthday with something special. She knows he's becoming a man, and she wants to do everything she can to help his growth. After she sings happy birthday to him, she has something other than candles to blow, and a special present to give him.
Cherie is in the kitchen when her step-son comes in. He starts groping her and becomes aggressive and dominate almost immediately. It seems his birthday present got the best of him, and he wants more from his step-mom, and he is going to get it- even if he has to her.