I think you refer this scene when you say you can banish her. I didn't see any other option to banish her.
Banishing choice only appears if you choose first choice (you need to have level 5 purple). I usually try to be nice and choose to talk her down choice (first choice enslaves her). This means Monica and her mother come in pack and if you want to get one of them (without enslaving) you get other too even if you don't want to? I still think she should be avoided with a simple choice of not helping her move out without sacrificing your relationship with monica.
Banishing choice only appears if you choose first choice (you need to have level 5 purple). I usually try to be nice and choose to talk her down choice (first choice enslaves her). This means Monica and her mother come in pack and if you want to get one of them (without enslaving) you get other too even if you don't want to? I still think she should be avoided with a simple choice of not helping her move out without sacrificing your relationship with monica.