All this about one way phone calls brings it right back that my Mum particularly who was the queen of the snarky "So you're not dead then" when I did call (regardless of whether it was a day or three or a fortnight), said to me one day, very sadly, she wished that her grandchildren phoned her all the time and visited with her whenever they could, just like one of my aunts who was the centre of her extended family.
I was very tempted to point out to her that I was not the only one on the receiving end of her Female Dog. If my children called her they got more of the same usually followed by an inquisition of how are you doing at school, did you pass your exams, have you got a boyfriend/girlfriend and other prying questions, so they hated calling her.
Aunt on the other hand simply greeted everyone, either on the phone or in the flesh, with "How lovely to hear from you/see you, tell me all the exciting things you've been doing" and allowed them to decide what and how much they wanted to talk about. And they got the same warm welcome whether it had been a day or a year since they'd last spoken except if it was a loooong time she'd say "You must have LOTS to tell me".
Even my daughter came home from a visit with my sister who lives near aunt, and said why can't Granny be more like Aunt x and I had to try to explain that they were both asking for information about what everyone was up to, but that Aunt was able to do it such a more diplomatic way so that everyone wanted to tell her everything and to confide in her and that Granny has just never learnt the art.
As you can imagine, I try to be more like Aunt than Mum and never ever say why haven't you called or any other sarky snarky comment and I even call them if I haven't heard from them for a while!