It's your parents... You haven't learned to hide stuff from them yet?
Oh and if you tell them what your doing and they kick yer ass out it will give you more motivation to get yer ass in gear and pay your bills
btw it's yer parents you don't have to lie to them. if they say fuck you. fuck them.
after they are dead you are are the one that is going to have to live with the choices you made.