Oh, I do understand what you are saying OneFineDay, and thank you for your pleasant reply.
Unfortunately, I have had some experience at going NC with family members, as my DDad's brother just disappeard out of my Grandmother's and Dad's lives many years ago, I fact that will have been in either the late 1940's, or the early 1950's. However, as I wasn't born until the late 1950's, I never met him myself. I do know that at one stage my devastated Grandmother - whose DH had died when my DDad was just 7 years old - from contracting Septicemia whilst tending his Lupins in their garden - contacted the Salvation Army to look for him, but after doing so, they told my poor Grandmother that they couldn't find him. Whether that was true, or not, and he just didn't want to be reunited with his mother, I don't know.
After my Grandmother died - in 1979 I think - and I was a young adult, I spoke to my Dad about me searching for my Uncle, but my Dad got quite cross as he never wanted to have anything to do with his brother after he had treated his Mum so terribly. So, a while after my DDad died I went on line, and discovered my Uncle's death certificate, dated in the 1990's, so he had been alive in all of the intervening years.
Quite strangely, after both my DMum had died, and then a couple of years later, after my DDad died, my brother and I, who had never been close as he was quite a lot older than me, ended up falling out, but not dramatically, and we have never been in contact since, which must have been about 10 years ago now. He used to work and live in many different countries, so I have no idea where he lives now, and he has no idea where I live, but as we have hardly anything in common, I really have no desire to ever see him again. Apart from my brother, I am very lucky and blessed to have the extended family that I now have, thank you . I hope that you and your DH are now in a much happier place since going no contact with your MiL.
NB: Very sadly, my paternal Grandfather died a few years before Penicillin was licenced for doctors to prescribe. My DDad had always believed that his DDad would have survived if Penicillin had already been approved of officially, and very sadly, he missed him for the rest of his life. Hopefully they are reunited now.