How is actually goin out with him u or her!!!! why would u not distract him?? after all he is your partner.
tell her to F***K off he is your partner after all.Where does he stand on this u should be able to come and go as u please.
just block the bitches car in cant park in the drive.
One way to get rid of her is get him to stand up to her and lay the law down as regards you she either likes it or gets out simple as!!!