If the stepdaughter is already interested in these pictures and videos, then her pussy is ready to be used for its intended purpose. And the stepfather has more right to her than anyone else. He catches a glimpse of her getting a high from his cock, sucking vigorously and greedily. Twisting her around and putting her upright - the man drives the bolt all the way up to her balls. Such a stepdaughter in the house is a godsend. Let her work hard to strengthen the family.
She should be in a beauty contest, and in bed the girl is fire! One thing I wonder is how her big breasts don't get in the way of a blow job. Where does she hide it?