Step-Son is a little worried because no matter how much he jerks off he keeps getting hard at the worst time and he cums like a river. He goes to his Step-Mom for help, she says she will ask Aunt Susan who is a doctor what she thinks. When Step-Mom gets back from the Doctor's office she tells her Step-Son he has to cum in a cup several times a day and have it measured to see how much cum hes producing! The one catch is he needs a helper and since there is no one else around a reluctant Step-Mom has to help!