You and Mary have been friends ever since you were little, so you basically know everything about her life, she's currently ranting to you about her father's obnoxious behaviour while pacing back and forth around in her chamber

As God as my witness, I do not care if he's my father, I hate him. First, he divorced my mother for that thing I have as a stepmother like it's nothing, and now he's neglecting me because she's with child?! I'M his firstborn child AND his legitimate heir! ME!