My [25F] boyfriend's [24M] mom [48F] called last night to inform us she owes thousands of back taxes and will lose her house - we don't want her to move in

have a pit in my stomach.
My boyfriend's mom is terrible with money. This isn't the first time we thought she might lose her house but learning that she owes almost $20,000 in back taxes and hasn't been paying the mortgage for months has me extremely concerned.
We have only been living in our house for a year and I have absolutely no desire for her to move in for multiple reasons:

1. She has been unemployed since June and I don't see her getting a job anytime soon.
2. She has two dogs that are crazy and not only would they destroy our new house, they would terrorize our kitten.
3. There is a language barrier that makes things awkward sometimes and also leaves me completely out of the conversation when she's around, so it would be like that every day if she lived with us.
4. My privacy would be sacrificed. She'd always be around because she isn't working. This is a big one.
5. HOW WOULD WE GET HER TO MOVE OUT? What if she doesn't find a job? This is my main concern.

My boyfriend doesn't want her to move in, either. Her entire family is in her home country and she has no friends up here so there's nowhere for her to go except to us.
I guess I am seeking advice about how to handle this tactfully without making a giant mess. I am extremely anxious because I'm worried about getting a call from her crying that she was kicked out at anytime. And I don't expect my boyfriend to leave his mom on the streets.
I wish she would be more responsible. She's almost 50 ffs.
Tl;Dr boyfriend's mom is irresponsible with her money and is assuming she can move in with us, we don't want her to and I'm freaking out


Source.