To be annoyed at lack of teeth brushing

[Peanutmandm]

My DS aged 8 went to stay with my MIL for 3 nights during half term due to work commitments etc and when I unpacked his bag the brand new toothpaste that I had sent with him was still unopened.
I questioned my DS about this and asked if he had used a different toothpaste to be told "no I just didn't brush my teeth " 🤢 I Know my son is 8 and can brush his teeth on his own but AIBU for being annoyed at my MIL for not reminding him /making sure that he brushed them as I really want to say something to her but don't want to cause a problem as we usually have a great relationship.

I would leave it this time as she may have thought he could be trusted. If he stays again make a point of asking her to check he has done it. Also let your DS know he needs to take responsibility too.

Getting angry with her isn't going to help. Next time he stays let her know that he might not brush if not told to.

Its really not a big issue and not worth getting upset over. Next time just say "hey MIL don't forget to get him to brush his teeth he still needs reminding" end of.

Next time just politely say. Please remind ds to do his teeth as last time he dodged the tooth brush.

My son did cubs and scouts and often did this once for 5 days. Yuk.

Gross. He's only 8 and she should have checked it had been done.

Thank you. I have already had a good chat with DS about taking more responsibility and also the consequences of poor dental hygiene which I think has hit home as he wants to brush all the time now.
I think I will leave it for now and fingers crossed it won't happen again.

At 8 years old does he really need to be told to brush his teeth? I'm sure when it was bedtime she probably told him to go up and get ready for bed, which you would assume would include brushing his teeth. You can hardly expect her to list every single thing he needs to do.

Maybe you should be teaching your son to do the right thing without being specifically told to do it, because I'm sure at 8 he knew he should be brushing his teeth twice a day.

Sorry, cross posted as I see you've already addressed the issue with him.