Not much sleep

Last night was an interesting one at my house. After I just bragged about Cole not needing diapers anymore. . . it was a rough night for mom. I tried going to bed early because I've been fighting this cough/chest cold thing. I woke up at about 1 am to go to the bathroom and had a hard time going back to sleep due to thoughts of what needed to be done before Christmas and other decisions. Cole wakes me up at 3:30 because of "pee-pee" he explains. Then Makaila comes in at 4:30 (not that I was really soundly sleeping) due to the same problem. What is it about cold weather? Does it make them just want to curl up deep in the covers and not realize they need to go?