I'm glad you had a great sleepover for Mommy. I can understand your DD's were thrilled to have their mother participate in one for herself. It's also good for the both of you to have that understanding and camaraderie about being LBS'.
And I second what Gypsy said. It is amazing how the thing we once feared the most becomes the very thing we need in our given situations -- separation brings calm.
I thought about that the other day. At one time I could not have conceived of a world in which being apart from W would bring peace instead of just anguish. I used to really resent having to leave W for any great amount of time -- business travel was always a big yank on my heartstrings. Now, living apart from the alien shows me that I have been bereft of my spouse for far longer than I had realized, even long before the bomb.
It still hurts, but I am certainly more at peace now.