1 - Whatever you want to tell them and F them if they have a problem with it.
2 - ... You're dating your x-wife. It is up to you man, and saying that, if you don't feel there needs to be boundaries or trust issues with a person who has shown themselves capable of hurting you and getting out of a marriage with you, then I guess you don't. I hope that it is because you are a better man than I am. However, once the newness wears off...and it will...like any relationship, where will you both be?
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK