When you see someone parent in a different way than you would, it can be tricky to bite your tongue and not put your two cents into the situation.
If the parent in question is one of your family members, however, it will likely be in your best interest to try and keep the peace and try to ignore the situation.
One woman felt like she couldn't let her sister's children's behaviour go, however, so when she was planning her birthday party, she decided to make it child-free.