There are many reasons.
“Sometimes people stop communicating even with close ones,” notes psychologist Valeria ALEKSANDROVSKAYA. “There can be many reasons for this. Perhaps the granddaughters do not like their aunt's point of view and prefer to avoid conflicts due to differences in opinions. Or they are not satisfied with her manner of communication, and they want to protect themselves from that, and so on.
It is not worth imposing communication. Imagine someone forcing you to call a person you do not like, with the argument: “Well, it will make him happy.” What about your comfort? You are being compelled to communicate with someone who does not interest you. Undoubtedly, maintaining family ties is important. For example, family celebrations contribute to this when the whole family gathers at one table.
However, every adult understands with whom it is comfortable for them to maintain contact and with whom it is not.”