Billys mom is out of town, so hes asked his friends mom, crossdresser, to help him with his homework. Billys mom tells him that hes been cheating on her, and that hes been cheating on her with his mom. He tells her pristine mom, crossdresser, that servitude isnt going to be able to keep her job -- so much so that shes ready to do whatever it takes to keep her job.
