I didn't let mine sleep with me till they were about 6 months old. Hoku peed on the bed 'once' and I put them both in their xpen in the kitchen the rest of the night. She's never done it since - she will lick my face and whine till I wake up if she needs me to open the bedroom door so she can jump off the bed and go down the hall to her potty pad. In my mind, sleeping with me is a 'privilege' and my babies know that