L.,
I'm not a single mamma (so I apologize if you are looking for just single mamma responses), but I find at any time any of my 4 kids wanting to crawl into bed with us for any reason...bad dream, just need some reassurance, whatever.
I'm all for the family bed as long as it's working for everyone.
You situation isn't all that unique. I find it quite sweet and you are following your maternal instincts. But, I can understand your hesitation considering your ex-husbands comments and you want to do what is the best for you and your son.
My thoughts and questions for you to answer for yourself:
Children want to be close to their parents...it's where they feel safe. Often in the middle of the night if they awaken, snuggling next to mamma is the safest place on the planet. They really do grow out of this phase. If you feel that maybe he is waking too often, perhaps you can ask him some questions in a non-judgmental compassionate way about how he feels when he wakes at night. How come he wants to sleep in your bed? Is everything in his world ok? School, any issues with his father? friends? How is he coping with separated parents? Maybe there is something going on, maybe not. But at least you can rule out anything negative that could be causing him not to want to sleep on his own. And not sleeping on his own isn't necessarily a "bad" thing anyway. Often our culture gets too tangled up in being independent and we push and push our kids to be super independent, when we really need to be encouraging INTERdependence...when we not only rely on our own strength, but also rely on others to help us through life.
If you really do all your research on co-sleeping/bedsharing and you know that your son is emotionally healthy, you will have the knowledge you need to talk to your ex about your sons sleeping habits. Your ex could just be grasping at anything he can find to hold against you.
Continue to check in with your inner wise mamma. She will know what needs to be done next. Whether it's letting your son continue to crawl in bed and snuggle with you, or to help him learn how to soothe himself back to sleep in his own bed. I believe that there is not a black and white one size fits all answer when it comes to the family sleeping routines. Really, as long as everyone involved is ok with the arrangement and our children are emotionally healthy, it's a personal choice. **Side note: Sometimes our choices are not the best in creating emotionally healthy and emotionally intelligent children...that is when we need to check in and re-assess the decision we made.
Lots of good energy to you and your son.
In peace,
A.
mom of 4, Birth and Parenting Mentor
www.birthingfromwithin.com