I'm bad at remembering character names and titles, but I am good at remembering the plot-line. So here is a description of it:
the movie starts with this young couple with children. It is the birthday of the dude’s mother so he finally tells her, she is a grandmother now and asks her to come. The dude’s wife is a terrible mother at educating her children, and the grandmother is a cranky old nag who left the house immediately after the children’s despicable behaviour. Then the movie starts showing the grandmother’s daily life and she meets a rich dude and she thinks she has met someone to spend her life, so the grandmother goes on a few dates with him, and she is certain, along him too, that they can spent their short span together. However, the rich dude passes away. So the grandmother goes onto the forest with a picnic bag, puts the picnic and she pulls out the gun and tries to kill herself. However, she hears some kids maunder, so she hides the gun.
I don’t remember if she does kill herself or not, but that is the main story.
1.The Mother's son lives in a more rural environment, while he lives in the city.
2. Her son seems to dislike her because of her gripeful personality.