She has been around your stepfamily for a long time and knows almost everything about you. You were taught to respect your elders so after a long day of helping "Auntie" when she suggests you both get comfortable and relax together you followed her direction and began to undress. You can't help that the site of her mountainous tits caused you to have an instant erection. Good thing auntie doesn't mind giving back a little help with her eagerness to please hands. She instructs you to lie down so she can have a close look at all you grew up to be. Auntie is going to administer the hand job of a professional as long as you don't tell your stepmother.