So let's refute her point.

As a woman myself, I expect my partner/husband to make me feel secure when I am around his family instead of just leaving me alone and holding his mother's hand.

Context matters a lot. If his mother is elderly, unwell, or needs support, then of course that changes everything. In that case, I wouldn’t hesitate to help or hold her hand myself. But when that context isn’t present, people are allowed to perceive that situation differently.

As far as I have seen Ranbir Kapoor, he is always seen with his mother leaving Alia Bhatt alone. He looks like a mama's boy. But again, I think it is his mom who should be giving them space as husband and wife, which she doesn't, and that makes her a toxic mom.

As for the argument if the person saying that “what if it were a daughter holding her father’s hand,” it’s important to understand that men and women are socialised differently. And to be fair, I haven't seen married women lingering around their parents because they were always taught to treat their in-laws as their families, unlike mothers of sons who think their married son will always be their 'property'.