That's narcissistic abuse, the sending the invite, which could only be taken as the sort of invite back into D's life you've wanted so badly, then, when your respond, telling you it was a mistake, which, as you point out, isn't remotely plausible. I'm so glad you didn't let it get to you. It is so great you're doing so well. Do you see that it's because of all of the great things you're doing for you that her games didn't pull you down to a dark place, like they did?
Unfortunately, you should anticipate more stuff like this. But you're where you need to be to let it just wash over you.
Great job.
Me: 46 W: 44 Married: 17 Together 21 D13; S10 BD: 03.03.15 (Not attracted to you) Almost 2 years trying, alone, to save marriage Status now: Divorced (effective 06.13.17)