Great! I had a ton of fun with this story. It's a challenge to know what to do after bed at first sight. I loved the idea of them not realizing how much more than that it had become, and borrowing Samantha who's both observant and unfiltered to smack them over the head with the recognition seemed an entertaining option.
I wasn't really intending to use Casual as a springboard for Reborn. Reborn was initially intended to be a short work only about Mika's artistic outlets recovering after her relationship with Lauren took hold. I'd intended for it to be very light on sex scenes, possibly none at all, since as you know I don't like to write sequels after a happy-ever-after, but showing Mika's side made me realize there was more possible, and including Shannon and Kathryn and sneaking in the drama between Rachel and Mandy gave me lots of things to show before the ending (which had been in my original plan). So yes, sex happened, too.