A several readers have commented on, there's clearly a lot of backstory behind Too Much Love. I've been using the Stone family for writing exercises, role playing games, and experiments since the 1990s. There are about thirty unfinished stories in my hopper that involve the family in some way.
In the first draft of Chapter 44, there's a scene where Shelby casually reveals a major detail about her past to Alexis. In a more melodramatic story, it would be a major life-changing reveal, but Shelby is taking it in stride.
It's one of a number of places in TML where a reader could think, "That's got to refer to another story." And it's true. But that doesn't mean the story is out there. Other than *Liaison Services*, there are no other stories about the Stone family out there yet.
Realizing that he would never have time to write all the novels in his own head, Kurt Vonnegut bequeathed many of them to his fictional alter ego, Kilgore Trout. Similarly, with 400+ unfinished (and in many cases barely started) stories in my hopper, I have to acknowledge that I'm never going to write most of them.
I'll probably never write the story of Sherman "Tank" Carson and his ex-KGB lover during the waning days of the cold war. I have notes for it under the title "Honeypot" in my hopper, but I never seem to write the ones that require a lot of research (pretty much anything not set in modern-day America or a wholly made-up world like New Rome.)
That being said, I have been planning a series of "supporting short stories" to come after Too Much Love and before its sequel Jester's Ransom. The only ones I know I want to write for sure are The Ransom of Threnody Ferrari-Stone which tackles Threnody's kidnapping at age sixteen and Teenage Dirtbag, which explains who Shelby's ex Beck is and how he got so fucked up. (And yes, it more than alludes to the Wheatus song of the same title.)
I haven't solidified the rest of the list, but I've started writing those two in parallel with TML partly to explore for my own sake what actually happened. If you're reading TML and have a bit of backstory you'd like to see explored in more detail, drop me a line.