Today I took DD over to my bestfriends house and her and my bestfriends daughter ran around the house screaming and playing for literally 2 hours. When we left there she was hungry and exhausted so I came home and fed her lunch and put her down for a nap. She did not want to nap at all. She cried for 20+ minutes. I rarely have to do CIO (she started STTN at 4 months) I feel cruel now for letting her cry that long but I knew she needed the nap. Is 20 minutes too long to let her cry at 22 months? She was fed and changed and all of that. How long do you do CIO for naps?