Energy drinks

My 10 year old tries to act all grown up and wants to drink energy drinks and coffee.

I personally don't drink either, and haven't had a soda in almost a year. Every once in awhile my husband will bring home a coffee or bang but in general all we have at home is water, gatorades, milk and apple juice.

Well when my son goes over to my sister's house she'll buy my son a coffee or get him an energy drink (he goes over there like once a month).

It bothers me a little bit just cause we tell him no at home cause it's bad for you. But it doesn't bother me to the point I feel I need to say something. It does however bother my husband, but he won't say anything to her because she's my sister not his.

I just feel like she's trying to be a cool aunt (she doesn't have or want kids) and isn't doing it to intentionally make us mad.

Should I say something or just leave it alone?