@Hejti Okay, I admit I was too distracted to remember that she did attempt suicide (I feel stupid lol).
I do agree though, the mother is in my opinion the most pitiful character of the series and the author is really cementing this as fact rather than guess.
For a fault of her husband's (and landlord's wife), the landlord gives them shit to eat in favor of evicting them out of spite. Freely taking advantage of her as her man becomes more of a vegetable than Kirito, and her son who couldn't see the forest from the trees even after having it spelled out to him.
It's pretty outrageous how one character alone, attracts so much amorous behavior towards her.