Introducting 2 Cats To 3 Cats

Hi I work at a hotel and they "caught" 2 of the kittens running around begging. I suggested before this to feed the cats by the staff canteen instead. They wont beg for food and will lest likely to be in the restaurant. But never mind. easier to offer 200 baht a capture cat to the staff.

Of course now I freak out because these cats are headed to the temple and although this is commonplace here as people like to feel good about it I know the reality of it.

So I can't bear it and I will take the cats home. But I have 2 cats that are already not thrilled about a new cat I brought home (kitten) 6 weeks ago.

I don't have the set up to put them in a big cage, or separate rooms etc..

Any suggestions? I don't want my cats to kill them. Although I think the new kitten will be happy with some fun playmates.

Luckily for me my boyfriend said he doesn't mind. (im a girl) and we live on a huge..piece of land..

any suggestions pleas?