If you really don't want the mother there, just make it impossible for her to live there. Leave empty condoms everywhere. Smoke weed every day and go around naked. Masturbate on the couch. Spit on the wall, never do the laundry nor do dishes. Put extremely loud rock/punk music. Try to seduce her and tell her she has nice breasts. Flip out randomly sometimes and act like you just saw Hitler invade the US. Oh man, imagine the *possibilities...*