I haven't dialed Elly or her Mom in to my liking as of yet, plus that was the maximum number of characters that I could fit into a single render pass in my video card's VRAM in any case. Usually I can only manage 5-6 characters, so 7 is pushing it. Note that they are all nekkid in the render, which allowed me to get away with seven characters, clothes would have added even more VRAM overhead...
Sure, I could have set up two render passes, and merged them in Photoshop, but that would have been extra work...
Rest assured, Elly would have a place in said hypothetical Crossover, as would both of the moms... not to mention Dee's brother (from Rachel's side, that's not canon, just something I think should be a thing, he's that young lad that Rachel is banging in the game...).
With the two moms and the MC's sister involved, not to mention three daughters and at least four gal friends and their dads/uncles, yeah the possibilities are endless! It's not something I'd personally want to take on, but I may make a quick nod to this idea in my other projects at least. But if someone else ran with the idea...
BTW, Parental Love 1.0 is supposed to come out this weekend maybe! I'm guessing 1.0 means that it will finally be fully complete with the rest of the other endings included...