Dear Prudence is Slate’s advice column. Ashley C. Ford is filling in as Prudie for Jenée Desmond-Harris while she’s on parental leave. Submit questions here . Dear Prudence, My sister-in-law is miserable and confrontational. I’ve been on the receiving end of her bullying several times. Initially, she seemed to have a personable, if volatile, personality. She was raised in the projects. Her mother was imprisoned for covering for her mobster boyfriend. Amazingly, she completed her master’s degree