How does this sound for revenge?

Long story short ,brother in law has a girlfriend I don't care for. Mother in law is a back biter and has played both sides of the fence pitting us against each other. They went on vacation and I casually mentioned to my hubby and his mother( over the phone) that I think that the brother in law and girlfriend should get married while they are out of state visiting her family. Question is: Isn't it better to give people exactly what they ask for especially when they are not expecting it? I had logical reasons and added a few ounces of sweetness to it. Right now as I post this mother in laws head is spinning on her shoulders and she is flipping out about " her baby" getting married( he's 44). By the way I confronted her on October 16 of this year about her being two faced about this whole deal and she has not spoke to me since. I was respectful when I confronted her, nothing nasty. she doesn't even call to see how her son and our kids are now.He has to call her.Am I wrong to be chuckling to myself tonight?