She likes the way he feels when he's deep within.
He wins all the rounds before they begins.
It is so hard to fight after the release, he goes from Mr. Perfect to a hungry beast.
She takes what she can, the more she tries to fight the more he digs in.
Her flesh is weak, her body needs to heal.  He wants more as his powerful thrusts reveal. 
He allows her to lick her wounds  and recover. She knows that she has a dominant alpha male as her lover.