Dear Lizzy,My sister married a jerk. And yet, I love my sister and my nieces and nephew. Your sister is staying married for a reason that is hard for you to see or understand. Maybe she depends on her husband financially, or she doesn’t want to break up her family, or she’s scared to leave. For example, if he yells at dinner, you can say, “Hey, please don’t yell.”And you can be there for your sister.