I love my FIL to death, but I do have the MIL from hell. She was sent from hell on a mission. First, she made friends with me. She was the mother I always wanted and we were so very close for about 6-7 years. After the 6 years went by she grew very homesick and began to try and make life a living hell. She also grew tired of hiding her horns and those are extremely obvious to anyone willing to look.
If I allow her to, she makes my life miserable and destroys my PMA. She wants nothing more than to see my marriage go up in smoke. In fact, I wouldn't put it past her to hold a gun to H's head demanding he file for sole custody.
So would I write her a letter? NOPE! At least not one I would actually send. Because...if I write her a letter I will be showing her that I notice her evil deeds. I haven't time in my day to waste on someone who wishes pain upon me.
My advice? Write the letter. Write ten of them if you wish. Then burn them. Your H is coming around, you have work to do and a new theme song to write. You haven't time to waste on someone who cannot even give you a second of his time to say a polite 'how are you'. Besides, what would this show your H?
"It is not easy to find happiness in ourselves, and it is not possible to find it elsewhere."
--Agnes Repplier, writer and historian