She is literally all alone, at least until Jang Mi becomes her daughter-in-law, then she will finally have someone to confide in. True that ep 7 and 8 were a bit of a letdown feels draggy and all but we get to see jangmi's hidden feelings and all.
KT's mom sure is a layered and deep character but I think she is taking away from all other side characters, they have been left in the shadows. Jang Mi's disease is that she wants to help and be wanted. While being harsh actually wants jangmi to come out for the better.. D I dont know if they're fully in love or what, but they seriously care for each other that it's hurting me too haha.