Breeding winter whites

Question
hi, im trying to breed a 15-17 wk old female winter white with   two 6-7 week old males, i introduced them very slowly and it went well she spent a day in the cage cleaning them, i didnt want to push it so removed them for the night. The next day i put them togethr and they fought pretty much constantly till i seperated them, no damage just rolling about and squelling. Forthe next few days the same happened she wouldnt tollerate them, then after about 4 days they were friendly again this time i was even more cautious so left them for only 3-4 hours, then the next day they fought again, any idea whats happening?, im preety sure they havent mated ive supervised 99%of thier time together?

Answer
 Dear Jack,
 Sorry for the late response. :/
If when you separate them they can't smell and see each other, they will sort of forget each other and you'll have to introduce them again.
I've never bred Winter Whites, so I'm not sure if it is the same as Syrian hamsters, but the mating ritual usually takes awhile, so if you really supervised them that much, I don't think they would have mated without you knowing.
Once again, sorry about the late reply.