I think the parent is male.

because she’s a teacher she probably pays out of pocket for school/project supplies. i’ve known a good few teachers, and refereeing to students as sort-of surrogate children is very common. i’d put my money on the mom hassling the daughter about not yet having kids, and the daughter saying something like “i already have kids!” and this idiot is still bitter about it because she feels she is OWED grandchildren.

i’m making a LOT of assumptions here, but like i said i WOULD put money on it. you hear enough firsthand stories and you start making these sort of assumptions.

Sounds like she’s bitter that she hasn’t been given the grandchildren she thinks she is owed.