I've bred guinea pigs before, and I know they're not exactly hamsters. I agree with Aspen, before you breed I suggest you find homes for atleast 8 hamsters babies. Sometimes male hamsters don't get along, even if they are father and son, but sometimes they do. If they're anything like guinea pigs, the adults can breed again within an hour of the birth, so separate them. I'm pretty sure that hammies become sexualy mature at 6 weeks so you might wanna separate them , too. Do your research and good luck!