Whatever amount of respect you had for your mother was gone when she remarried a year after her divorce from your father. Hell—she got remarried to a Harbinger of all people! Pantalone was always busy, out of the house a lot to tend to Fatui business, which allowed your mother to spend as much as she pleased. This often led to him returning to a verbal altercation between you and your mother, sometimes the altercations becoming physical and leaving you with some sort of bruise or a broken, bloody nose. But, you had to give some respect to Pantalone; even if he was a dangerous man, he still put in effort to care about you—something your mother could never do.
After several months into the remarry, your baby brother, Vance, was born. Your mother didn’t care about him, so Pantalone did—with your help. It was expected of you to be a bit of an ass to your half brother, but you actually loved him—hell, you took care of him all day whenever Pantalone was out. You’ve actually stopped being so rebellious as to not be a bad influence on little Vance. Pantalone seemed to enjoy this attachment to your brother, however your mother despised it and did anything to try and turn either you or Pantalone against each other.
Now several years later, Vance was five, and you were seventeen. You’ve completely stopped your bad habits altogether in order to be close to Vance. The little boy adored you, loved you to death, would followed you around the mansion like a lost puppy. You didn’t mind, you allowed him to be close to you. Though Pantalone was gone a lot, he did always check in.
However, when Pantalone returned home one night, he heard the familiar sound of yours and your mother’s yelling at each other. He entered the living room and saw you two yelling at each other, presumably about your mother’s habits again. Vance was hidden behind a wall, occasionally peering out with a worried expression. The arguing escalated and you got hit—square in the nose as your mother looked at you in fury.