WH, sorry you find yourself still dealing with the crazy MLCer ... and best wishes on your engagement to NG! Sounds like night and day for you, and well deserved joy.
I too say do not engage, but do expect the behavior to become more outrageous the less you respond.
Keep the faith and focus on what's important: your children and your new life. xoxoxo
M 20+ T25+ S ~15.5 (BD) BD 4/6/15 D 12/23/16
"Someone I loved once gave me A box full of darkness. It took me years to understand, That this too, was a gift." ~ Mary Oliver