I'll try to be brief but not drip feed
I generally have a good relationship with my in-laws. They seem to genuinely care about me and I know I am lucky in that respect.
However... I just found out that they were giving my DD cows milk when she was intolerant to it. They knew full well she was previously intolerant (recently completed the ladder) but told her this weekend that they had always given her dairy and she's been fine. The thing is though that she wasn't! It was delayed onset intolerance and she often used to come back and be ill a day or so later but they always promised us it wasn't them, although I had suspicions.
I don't know what to do! They clearly didn't believe they were harming her, or that it had an effect, also it's a mute point to some extent now as she can have it but on the flip side I am furious that they went completely against our instructors and harmed their grandchild!
Yabu - let sleeping dogs lie for the sake of a good continued relationship
Yanbu - say something (in which case what??)
Thank you!