Glad to hear you are going on a vacation with the kids.
Your Ex didn't have to wish you a Happy F's Day, but she did. Maybe unexpected but then again, we can never tell what they will do. My Ex actually responded to an email after 8 months of never even an acknowledgement of my emails. Blew me away.
As for your FIL getting remarried, at that age, I hear it is for companionship and usually nothing more. Love at that age means something different than when we are 20, 30, 40, etc.. It doesn't mean he didn't love your MIL. I know it sounds foreign to us but then again, we're not in our 70's and I don't want to judge him unless I was walking in his shoes.
Also, his sitch is different than ours. His W passed away. There is closure.
Enjoy the vacation. Sounds like it will be fun.
Hugs, ISLH
Me: 49 - S22 & S26 H: 41 - No kids M: 10/00 Bomb New Year's Day 2006 H living w OW 01/07; have baby 12/07 D final 07/07 Thread #9 - Hope Lives On