Could be some concern she has about a new baby, children do get upset when babies arrive and get most of the attention .,maybe heard a lot of talk ..it may be a good idea to wait to see what the tests say that I assume the Doctor has ordered. Lot on the internet about cushings .Good Luck.
plenty of exercise both parents very active. mom is vigilant about snacks and portions. New sibling due any day now. new house a year ago. Doc thinks maybe Cushings
What has changed in her life , new home , new sibling, does she eat a lot hence the weight gain? What would be a days food for her ,and exercise is a good thing, so not wanting to have any physical activity should not be an option, children follow where we lead them, does her Mom take her out, parks,walks fun ..Plenty of healthy snacks and foods out there, what did the Doc tor say about the increased carbon ? .