Ok guys, this is a bit of a what would you do how would you feel topic.
Here's the setup. We're at my parent's house with my sister, her husband, my grandma, and obviously my parents.
My son (3yo) is being good and is giving us no problems about leaving, I have a car-seat in both hands and both girls are being good. So now we just have to say bye.
We remind or son to say bye to everyone and my mom sort of takes over telling him who to say bye to. It was really annoying because that's our job and we were doing it. He was listening so all she really needed to do was wait for him to say bye to her and not get involved.
The thing that got to me was she also told me she say bye to my grandma. She didn't even try to be discrete so everyone heard her say it. It made me feel really awkward and embarrassed. Normally after our son has said his bye's we'll just say bye to everyone at once while leaving. I didn't know what to do so I just said see ya to her. It felt really weird being told to tell someone bye as an adult in the same fashion she was telling our son to say bye.
She did other annoying things while we were there and this was the icing on the cake. Even after sleeping on it it's still bugging me.