MIL I'm on the edge!!!! push me off! try me...😈👿

So my husband and I let his mom move in with us couple of months ago cause she wanted to move out if her sisters house. so now she has moved out with a man in his house(she has done this before it's like she can't be alone) so me and the hubby decided to move closer to his job and we are in the process of moving now. I was so excited that we were going to alone! But now she asked us yesterday that if it doesn't work out with the guy she is living with can she move in with us again!?! I mean really?!?! when will it end?!? I have been married to her son for almost 8 years and I don't know how much more I can take!! We only got a two bedroom and that's my daughter's room so she wants to live in the build on room that's supposed to be a back porch!! I told my husband no I don't want this but he gets upset and says all I do is bitch! so I asked if my mother could move in lol he said no! so what's the difference!?! this should be the other way around!! you know the kids living with the parent!! not the parent living with the kid and his wife and also daughter!!! this just has really got to me we are never going to be alone as a family!! I know it's his mom but damn I couldn't even live with my mom!! I mean what would you all do?!? ugh sorry for long post can't vent to no one else so I figured you ladies wouldn't mind.