My daughter blames me.

My 31 year old daughter is about to become homeless with her husband and pets.
The landlord has decided to sell up which I don’t believe is the case because my daughter and her husband brought a puppy but didn’t inform the landlord and he saw them walk the puppy and within 3 days they are giving a section 21.

My daughter then makes the decision that she is going to move back home into my house with husband , 2 cats 1 Labrador and fish.

I do not have a spare bedroom but my loft has been DIY into a room with a sky light but that was used many years ago 10+ as a space where my then teenager kids could go to have quiet time or do course work etc as I have 4 kids so they shared bed rooms 2 in each.
It is not officially a bedroom so definitely can’t be used as one as to access it you go up a ladder.

My daughter wanted to use this space as a bedroom for her and her husband and stay for a maximum 1 year while they saved up money/ paid of their debts etc.

I told her that they couldn’t move in that I definitely didn’t have the room and that I didn’t want 2 cats and a puppy in the house.

I and my husband are both classed as disabled ( no we don’t claim Benefits due to my husbands Armed forces pension) so even if we had the room if she stayed it would never be due to losing out on benefits.

Anyway she then went mad at me became verbally aggressive via video call and then text that I was a evil woman for leaving her to live on the streets and that she was going to commit suicide and on and on it went she said I never ever helped her when in fact I have done the opposite I am actually now left with no spare money as the little bit I had saved up over a few years she has slowly taken from me saying she had no money could she borrow some to buy food etc and always said will pay me back it was just over £400 but that was all I had and it had taken me a long time to have saved that up and she has taken all that and now I will never get it back.
I never want to see any of my kid’s struggle and if myself and their dad can help them we always have done as we struggled a lot when we were younger.

But the worst part of this is that I have grown up and since I was 13 years old have know my dad wasn’t my real dad anyway beginning of this year i did DNA test found my dad had sadly passed away but i had 4 half siblings who had always known about me because my dad never ever forgot me.
Anyway I have got to know them especially one sister very very much and we chat every day.
well my daughter contacted the sister and the brother who I don’t chat to as much but still is happy to have me as his sister and said how evil and nasty i am and not to believe anything I say etc and it has broken me , How can she go to such low levels and do this to me after I have tried to find my dad for 40+ years , The sister I speak to every day says she doesn’t want to be involved and I have agreed with her that my daughter should not be dragging in my newly found family who are on the other side of the family into something she has caused her self it is upsetting as well as embarrassing and because I am still getting to know them they could actually decide i am not someone they want it their lives.

I have refused to speak to her at the moment but she had removed all forms of communication anyway.

what else was I meant to do I just don’t have the room of course I don’t want to see her homeless and I did keep telling her to check with the landlord before she got the puppy.
I am just devastated with it all.
Just want to know what other people would do if it was them.