In-laws keep giving advice that's 30 years out of date

Your husband needs to step up here. "She means well" isn't a plan. It's his mum, it's his job to have the harder conversations.

gr8ful_grandma, thank you for that perspective. I hadn't thought about it feeling like an accusation. The health visitor thing is genius. And Bex, yes. I've told him he's doing the safe sleep conversation this weekend.

Mine kept trying to give my son a dummy dipped in honey. I had to physically confiscate the honey jar. You're not alone.

Dad here. I had to have this conversation with my own mum and it was awkward, but she took it better from me than she would've from my wife. Your husband really is the right person to do it.

Water at 10 weeks was the one that got me. Baby only needs milk at that age, even when it's hot. Health visitor confirmed it in front of my mum and that was the end of it.