You've never worked nights, have you? I have.
So Mom's supposed to work her night shift, come home, stay up to supervise a 14 year old boy, and only sleep after Dad gets home from work? By which time she likely only has a matter of five or so hours before she has to be at work again?
Of course you're expecting her to stay up and supervise him. You've made a point of how irresponsible the boy is. He might as well be left alone if she's sleeping while he's at home, and you've very strongly implied that someone needs to be watching him at all times.
And you expect to be PAID for watching your boyfriend's kid? Lady, you're a real piece of work, aren't you?