Get your daughter out of your home - now. If she can move in with a relative great. If not, rent her an apartment. Just get it done.

Your son has some hold over you and you need to break it. To that end, consider moving both you and your daughter to an apartment, and leaving your son with his father.

Either way, you and your son are not good for each other right now and you need to face that fact. If he doesn't leave, you need to leave.