Feeling bad

So I recently kicked out my BD and he’s struggling financially and now lives with his foster dad he sleeps on the living room couch I feel bad for him despite everything he did to me he wants to take the kids on his days but got nothing for them to sleep on i don’t know how he’ll do it but i don’t know if I should allow him to come stay with me till he gets an apartment which probably would take 4 months or more but sometimes I just think about the crap he put me through your thoughts? Thanks