I've always wanted to foster and my sister in law said some awful things about not wanting anything…

I've always wanted to foster and my sister in law said some awful things about not wanting anything to do with it. Basically said she would ruin her interview so I wouldn't be able to get my license. So I cried and forgot about it. Well today I was talking to a coworker who fosters. She has ignited my passion to be a foster mom. Told my husband we need to have a family meeting this weekend and tell his sister she is either on board with my decision and will cooperate and actually not sabotage her interview or she has 30 days to find a new place to live. I think that's a reasonable thing.