I have co-slept with all of mine. A few months ago I had had a rough night with DD2. She finally went back to sleep at 6am so I got up and crept out. Thought I heard a noise a bit later and went looking for DS so he didn't wake her. He wasn't in his bed, or his room, or out with me...I couldn't find him....until I went to check on DD2 and found him, asleep, snuggled up behind her...