Sj, I know how hard it must be, trying to get your point over when she starts crying, but that is a little bit of emotional blackmail even if she doesn't realise it. Your baby, your rules. She has to respect your decisions, do just choose your moment and your approach, but don't back down, if she starts crying, this is when it's make or break time, say something like, I don't mean to upset you, your a lovely mil and nan but this is how it has to be, because although I haven't cried over it, I feel like it and I dont want this to cause problems when there really isn't any need. Then it's up to her. People are reasonable when you are I find. If still no joy, a bit of distance to reflect on what you say can't hurt her, time to reflect. It should go through you, not your husband, that way it stays clear. Good luck.