MIL is 80 years old and in the early stages of dementia and keeps giving our 18 month old tea (not hot) from her cup. We have repeatedly asked her not to but DH got really frustrated with her today and she got upset. TBH, this is absolutely something she would have done before the dementia/diagnosis (SIL has confirmed she had the same issue 15 years ago). I absolutely hate it but to coin a Mumsnet phrase, it’s tea, not crack, and is it really worth upsetting an ill old lady over? I never say anything to her BTW but I don’t need to as DH usually tells her gently not to do it.