It’s Quite Urgent
The mother in this conversation was eager to get the attention of her beloved daughter and didn’t want to wait for it. We get the concern of the parents to make sure their kids are connected with their relatives by wishing birthdays and stuff like that, but it doesn’t have to be on the spot.
Maybe the daughter knows her mother and it is normal for her, which is why she is not bothering to reply to those texts. Or maybe the mother is simply trying to get her daughter to see her phone. Whichever it is we will never know.