Your little man has his own personality.  He's his own little person and has no understanding how to  conform to your daughter's construct.  Your little boy  just wants to be with you. If by having him nestled by your side for a few months, or a year or two, accommodates an acceptable familial sleeping pattern, then so be it.   He won't be sleeping in your bed when he's 10 years old. If you're open to having him in your bed to placate all concerned .. so be it,  You may enjoy and reflect. When he's a little older ... he'll have his own bed and you'll miss him being with you. Unfortunately, parents are told  they need to separate themselves from their babies.  In my mind, your son was nestled and nurtured  in his mum's tum for 9.5 months. He knows your voices ... that is what soothes and comforts him. Do not take on anyone else's advice ... do what works for you!  He is your child - be firm & loving. I've commented on your post because your circumstance is the same as mine was .. my daughter just celebrated her 17th birthday (in isolation - as the rest of the word is) and she's just as an ordinary, everyday teen.    You'll be fine.  He'll be fine.  Just go with the flow,  If having him sleep with you works for all ... just go with it !! ... View more