I kind of agree with your hubs. Net, the moment she hit 13 mths showed many signs of power struggle. Although we had no cot issue since we co sleep, but she resisted to many usual patterns. She even chooses her clothes and shoes now!!
give him some time, patience and reassurance. If you plan to give him his own bed, you may wanna consider giving him now? Also is the cot too small fr him?
my two cents.. tc!