Think yourself lucky, my dd would leave her son with anyone, friend, latest boyfriend, elderly relatives etc. He was only a few months old when this started. The baby's dad didn't step up. I was horrified to hear thar my gs was being passed to anyone who would have him, for many hours, overnight etc. I tried to talk to my own dd about this, but she continued to do it anyway. In the end, 8 said I'd have him whenever she needed and she completely took advantage. Sometimes you have to balance how much you challenge things with what effect it would have on you if you helped out. Having said that, it is your son who should be taking charge, and hopefully he is prepared to do that so his children are safe.