sister in law rant

I really don't like the fact that my sister in law goes around talking about mine and my husndands (her brother) life. He is the only brother out of 5 children and he's second to the youngest. I get people talk when they are bored and have nothing else to do.... my husband lost his job a few months ago and we have been struggling but I'm managing to get our bills paid.  But I  feel like she has no business whether it's her brother or not to go around talking about our lives to her friends and co workers. I told my husband about it and told him how I felt. And he understands how I feel. But at the same he feels like I am just finding a reason to talk shit about her , but it's not the case at all. sorry just a little rant.