I don't think that headcanon of yours is dumb.
I can see why it could come off a little clichédly hetero to some, but I can't say I'm opposed to the thought. Thinking of their love manifesting domestically has its definite charm, and adding a kid or two in that is indeed a lovely, funny thought.
But maybe it'll just be a dog, and they get their share of parenthood looking after the kid Joyce and David are going to have once Chloe is out of the house. Without most of the pesky problems that come with it, at that!
I never actually thought of a song that would fit the AU. The one you posted is quite beautiful and fitting indeed.
I think it is describing that there is no song for the entirety of it, but one immediately once we erase it. Apart from the brilliant instrumental score of course. Well, there's Mogwai at the end of Episode 3, but that is precisely about the not-knowing where and what Chloe was in this foreign timeline.
Maybe something from the Blade Runner soundtrack: youtube.com/watch?v=48rBt4Pofso
One more kiss, dear, one more sigh
Only this dear, is goodbye
For our love is such pain and such pleasure
That I'll treasure till I die
So for now dear, Aurevoir, madame
But I bow dear, not farewell
For in time we may have a love's glory
Our love story to tell
Just as every autumn leaves fall from the tree
Tumble to the ground and die
So in the springtime like sweet memories
They will return as will I
Like the sun dear, upon high
We'll return dear, to the sky
And we'll banish the pain and the sorrow
Until tomorrow, goodbye
One more kiss dear, one more sigh
Only this dear, is goodbye
For our love is such passion, such pleasure
I will treasure until till I die
Like the sun dear, upon high
We'll return dear, to the sky
And we'll banish the pain and the sorrow
Until tomorrow, goodbye
...I really wanted them to kiss, or at least hug, in the AU. It's so meaningfully all about their love.
Thank you user!