Any advice is greatly appreciated. My ex partners mother wants to have our child over night, she has said she will cosleep with little one which I massively disagree with, I did for a while and I had such anxiety doing it and finally got little one sleeping in their own crib. My ex doesn't think there is any issue with it but I find it very strange considering that we don't do this anymore as we felt from a safety perspective, now he is older and moving around it's not as safe and also she is not his parent! Is there anything I can do other than voice my concerns? As we are not together he is saying I have no say on what he decides to do?