I have a friend who frequently kisses my young baby on the lips. It's happened since he was tiny and I was always so shocked and uncomfortable but stupidly didn't say anything at the time. I don't see her much (and probably will try to not see her at all! But will be hard as there's a group of us who met a similar way). She also gets her two young children to kiss other kids and adults on the lips to say goodbye and seems to think it's cute! (They are always gross and snotty, another thing that makes me angry as I see it it's out of order to even visit a new baby when someone has a cold).
I dunno maybe IABU but I'm just so mad! I'm so annoyed I didn't say anything as well it makes me feel like a shit mum that I didn't step up because I was embarrassed 

Am I over reacting? Does anyone have any suggestions to tackle it? What would you do/have done in that scenario? X