She is the ex girlfriend of my boyfriend/baby daddy’s older brother. A family “friend”. Not only did she try to weasel her way back into my brother-in-law’s life after he was in a relationship and had a baby on the way, she then tried to interfere in my relationship. My boyfriend is 12yrs younger and we have a child on the way, which she knew about. She lied to my face and my sister-in-law’s face when confronted. She’s manipulative and low down.