<human>: Can you provide a brief overview of the text?

I have a pet cat and my brother and his newly wed wife have a dog (that I used to take care of while he was in the military), and it's already pretty crowded in my apartment; at least I think so. It was supposed to just be my brother and I and his dog and my cat but he ended up meeting someone and after 8 months married this girl, so she's here now too (which is fine she's awesome) but apparently her old cat had kittens or something and they've been telling me they are going to bring a kitten home from their trip this upcoming week. I say stuff like, "I'm not signing for one haha..." and "Nah, she would end up using my cat's stuff..."

So the other day they were thinking of cat names and I sort of realized they probably are going to really do this. He said something like, "The apartments will never know!" and said he would sneak it in a box and laughed about it. 

The problem is I'm not sure how I feel about this. I already said I'm not signing for one, we are breaking the lease in 2-3 months, they can wait that long it's still going to be a kitten, but it seems like they are pretty intent on this. I've already said I'm not signing for one though and disagreed to it, so I don't know what I should do, or if I should wait and see if they really do bring home one (he also talked about giving our mother one as a present on the way home), or what.
<bot>: My brother and his wife want to bring a kitten home, I said I wouldn't sign for it but I think they are serious.