tell your family NOT to bring up the topic of your m. Just tell them clearly this is about their paying respects to FIL and just that. Plus it won't help. Perhaps your mil will bring it up to your family, but your family can simply express regret b/c they love you both and the granddaughter, etc...generic regret, etc.
Also, of my 5 brothers, 2 were div and their ex wives came to my dad's funeral. I was pleasantly surprised by it. And impressed too.
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016