How to handle a two-faced sister-in-law?

[Infuriated]

My brother and his wife were recently at a family gathering (our family) and my husband and I were not able to attend. My other brother overheard our sister-in-law trash talking my husband to another couple at the gathering.
My husband is a photographer and the couple had selected him to shoot their wedding. Our SIL went on and on about how the pictures were horrible and it took forever to get their proofs and they still haven't gotten their album, yadda-yadda. She put enough crap in this girl's head to make her walk over to her fiance and ask if they should reconsider using my husband. Thankfully her fiance told her that they would talk about it later, that he did not want to discuss this at a family function.
Up until an hour before the family gathering, my husband, daughter and I were going to attend but daughter had fever and I did not want to expose my family, including the SIL (who is pregnant), to something and get them sick. I can not believe she trash talked my husband at a family gathering for OUR family. I am SO infuriated. She obviously doesn't give a damn about my husband and to trash talk him and ruin a business prospect is also hurting ME and our daughter. It affects OUR income. Her husband (my brother) is SO whipped by her it is ridiculous. He jumps right on board and trash talks too. We now have seen and heard her true colors. And PLEASE do not make the excuse that its her hormones because she is pregnant. I can ignore her at future family gatherings but why should I have to put up with this? It's MY family. If anyone can offer any advice on how to handle her I'd appreciate it. Thanks.

 

[fifthfox]

Wow, sounds like my situation exactly that I just posted. Do nothing. Out-class her. She wants you to stoop to her level. She is threatned by you and your husband and your family. It will become more than obvious that she is the one with the problem when she's the only one talking. Trust me. Smile, genuinely ask about her day, tell her you love her (sincerely), and just keep going on with you life. Unfortunately, she will probably not change. But on her side, she will stay in the same spot for years, with anger weighing her down. At the same time you'll be moving forward and will be happier for learning to deal with it. She cannot control her emotions, they control her. Don't fall into that trap. Let her look like the child..... out-class her.