Just got a replacement rat off one of the great guys around here (Pghball) and the rat is already pregnant.

Now I was already planning on keeping the male and 2 females together, with the babies, thats just how I want to do it and it seems a lot of people have luck around here with that setup, I understand the risks and everything else. However this is a special case as they are not his offspring (she hasnt given birth yet, another week or so before she gives birth). The females grew up together and most likely havent been apart very long, and the male is fairly young and rather gentle (he's not a MALE and is more of a male), so I put her in with the other two and they are all getting along well (I watched their initial interaction to be sure everything was fine).

Now, I am concerned about her giving birth to babies that arent this male's in the tub with him. Will a male kill offspring that arent his own and should I pull her and let her nurse separately? I want them to get used to one another instead of pulling her now and would pull her before she pops, so, what do you guys thing? Leave her in or pull her before she gives birth?