DS is 4.5 and we have been trying to get him off the dummy, I know we left it far too late but that's something else completely. In short, we had a failed attempt to get rid of it at Christmas, and we ended up giving it back. We told MIL about this, just in general conversation, and we said we'd try again soon.
So anyway, we saw her a few times over the festive period with nothing much to note. But on new year's day when we saw her, she told DS that he was a big boy now, and it was time to put the dummy in the bin, and instead he should suck his thumb.
Even though this advice is undoubtedly coming from a good place, and I appreciate the effort, I thought that it was a terrible idea. Surely this is just replacing one habit, with a slightly less orthodontically acceptable one? AIBU to ignore/discourage her advice completely?