So for the third (maybe fourth) time me and DH have picked up our DD from grandparents around 6-7pm after they've had her for a few hours to be told she's had 'milky tea'. She's 21 months old.
We don't give her any caffeine at all and has asked them 3 times not to do it, we even offered bring round decaf tea bags for them as we drink decaf at home.
DH picked her up earlier to be told she had it again today. I'm really annoyed it's happened again and feel it's impacting her sleep. Apparently it's so weak ot wouldn't have an impact (it's the teabag they've used dipped in water and a splash of milk).
Am I right to be annoyed, or overreacting?