<human>: Summarize the given text in a few sentences.

So my brother "Dick" used to live with my boyfriend "Dan" [21M] and I, but he recently moved out because there was constant drama because Dick is a nightmare to live with. (Dick is actually my boyfriends brother, but he's basically my brother too)

Dick is currently staying at a friends house where he can't bring the cats. Another important part is that Dick left 2 days before rent was due, so Dick and Dan's wealthy grandparents offered to help us pay his share of rent in exchange of us watching the cats until our lease is up in July.

Dick has two cats, the mother and her kitten. Recently, mother cat has been very agressive towards her kitten and my cat. We keep them separated but it's starting to get very stressful. 

I told Dick about mother cat's agression and suggested he find another home for her. His response was that it's "not hard to keep them seperate".

Dick wants us to lock up mother cat in his old room which has no furniture in it, but I feel bad keeping her in a small, empty room all by herself. We usually have her in our room but I'm allergic to cats so we don't have them in our room at night because they try to cuddle with me.

I'm at my wits end dealing with this, mother cat is getting increasingly more agressive and I'm worried about the well being off the 3 of them.

Am I really over reacting, should I just deal with it for a few more months?
<bot>: Watching brother's 2 cats, one of them is super agressive to the other and to my cat. Should I deal with keeping them separated or do I refuse?