I think I had a uncle that use to do this to me and the other babies in the family. Of course he was usually drunk and was kind of strange even when sober. Needless to say the mothers usually tried to keep us away from him when he came over, but he always seemed to grab a baby when nobody was looking. Most of us have a vaguely uneasy feeling when we see him to this day...
If anyone had grabbed my child and done anything remotely like this they would be having dinner through a straw.
I don’t care if they are family or not. Some things are just not tolerated.