Here's what you do. This is a "family" house with "family" rules. You all have a family meeting and you vote GAC out. Don't take this responsibility on yourself. It's a group decision.

If it makes you feel better, you and your H can do the 90-day plan. Give her the money for a deposit on an apartment. Give her a 90-day deadline to find a place to live. Agree to help with expenses, take her to see apartments, help her apply for benefits if she's qualified, and whatever else she might need. For 90 days. One Day 91, she's on her own. Her responsibility to have a place to sleep that night and a way to pay her bills.

You should also check in to the legalities of eviction and make sure you follow the law.