Well that’s up to you. If you know it’s 100% going on shopping that’s fine, but as you said you’re the main provider so I’m gathering she’s funding it with your money.
I attend marriage counselling and I told the counsellor that my husband would never let me end the relationship, he told me that no one had that power over me and if I was 100% sure I wanted my husband to leave I’d enforce it. So all I’m saying is if you really want her to leave, you could make her. I do understand how hard it is though.