Depends on what kind of relationship you have, which I think in turn tends to depend on the age and the sex of the children, among other things.

A 14-year-old boy, yeah, rather gross, especially if he is uncomfortable or sucks at expressing their affection any other way on other days.

Me, a 40+ year old woman who has a warm relationship with my mom, now with an additional layer of “two old women”, and a history of dirty jokes: Nah, I hope she got a chuckle out of the pic (I visited a week early, didn’t think of making something like this).