Sounds broody to me. How cold is "really cold"? (You're in Texas, right? Here in MN it can get below zero by that time of year, so I'm just looking for a reference point) If it were me, and I let them hatch, I'd leave them with the mother and let her keep them warm. I'm so looking forward to having a broody to raise chicks for me! No worrying about turning eggs, temperature in the incubator, setting up the brooder... And it's just so darn cute to see them peeking out from under momma - heads sticking out from under wings, in the wings, under her tail. My vote is, go for it!