I'd do that. Say bye and walk somewhere else in the house out of sight wait for her to leave then lock door. If she comes back don't answer it. If she follows u say no u need to go my day is done thank u. If she yells while u walk away to try to talk don't answer her. The silence should give her the hint. Good luck!! Don't worry about her feelings. Respect ur home and ur self and set her straight. Ugh.....can I come do it for u? Hahaha