Manhwa

hellooo I need help finding a manhwa pleaseee it goes like this the lady/queen wanted his son (white haired) to be the king and she did many things but basically she was so strict to him, in the end I think the he killed her or like he died and she regretted everything she did then when she returned to the past she became kinder to her son, and then her son in the past visited her in the present??? He was mad at her and the young him because they have a good relationship and he was like why are you good to him but not me? and she apologized to him and all that all I remember