The door had scarcely closed before their lips met in a desperate display of lust. The very air seemed stolen from Celestia’s lungs, escaping as a cooing moan into his mouth, returned with a rumbling growl starting deep in his belly that made her heart leap.

She pressed herself into him, all the better for the electrifying rush that every brush brought her. Her own fingers could never bring her sensations like this. It took someone else, someone who knew her body as if it were their own. It took him.

She spread her wings for him, to let him know she was ready. She cast her crown aside as the last remnant of decency separating her from him. And with her kiss, she let him know she was ready. To accept his embrace, to take his seed, to bear his children. To tame the monstrous lust, ease his aching and yearning, to hold him close when it was all over.

Hoo boy, this took a while to make. Almost a week. Above written word courtesy of my friend, an amazing writer (especially when slightly drunk, apparently), Pocketwatch.
At first I meant to have Celestia hug back but I figured them removing physical signs of royalty, the tiara and the crown made them seem more... sexual? More equal in each other's eyes, where station doesn't matter. And trust me, that crown is coming off.

And while this image has a very... romantic look to it, I headcanon they are just a liiiiiittle bit dorky with one another. I considered putting them on a balcony, with the implication that they accidentally fling their regalia over the balcony's railing to a garden below and have to search them at 1 AM because otherwise everyone's tipped off on their scandalous relationship. Which I find absolutely adorable, just saying. But, I figured Sombra's bedroom gave a nicer vibe (re-re-re-re-read Reflections to fish out the look of his room, btw, so it should be accurate-ish.)

...I'm a sucker for tragic romance.