Your point's well taken. I should be thankful she cares enough to call.
But she does need to get over herself. She is no longer the paragon of motherly virtue she pretends to be. Her little comment that you quoted, "They just need to know they are cherished" is just a trite platitude ...but one meant also as a backhanded accusation that I, by contrast, do not cherish our children, that only she can.