i'd save up the money to buy the snake yourself, and clean up your guinea as well/best you can.

then i'd tell her you can house the snake in a plastic tub- you could get a black one or a clear one and spray paint 3/4 walls on the OUTSIDE black or something dark (do this and let it dry well looong before you put a living animal in it). tell her she'd never have to see it, and you swear you wont chase her around the house with it ^^

honestly i keep a dont ask dont tell with my mother. she keeps out of my closet and we're all good

:B

and hey, if you do have to wait till you move out, you could grow a HUGE piggy bank for it and probably buy a nice morph as your first