In my situation when my first marrage fell apart after 13 years it did get a bit bitter and I did recieve a few solicitors letters but I posted back to the solicitor that I wished for no dealings with a third party and the hint was taken.
then we talked like adults not kids and sorted the mess out and moved on
Life is too short to get into messy situations, if it is over then it is over just both of you let it ride 2 years and then it is done and dusted
For the record I have had no contact with my ex since the divorce, I do hope she is ok and happy. Because I am 😀