User blog comment:B214/Volume 21 info & spoilers/@comment-50.139.232.230-20160220171825/@comment-1359322-20160222045032

Vali's dad might be the one who killed his mum though. Maybe Vali's mum was protecting him till Rizevim interfered and "advice" his son resulting in his mum being killed by his dad, ending his peaceful life and changing it into a live where he seeked revenge on his father and grandfather. Don't forget, Vali wanted to kill his father too, it won't be out of place for his father to kill his mother.