There is something thrilling in how Eren moves, his balance having shifted to accommodate the changes in his body. Something thrilling in how he allows Reiner to undress him, patient enough to let Reiner do this. Eren isn't helpless with two limbs missing; Eren wouldn't be helpless even if Reiner had cut off every limb, leaving just teeth as weapons. But the shift in physical power is undeniable, and that, too, is thrilling.

Reiner knows better than to push Eren's patience too far, lest he wind up with a wildcat instead of this softer moment. But pushing it a bit? Well, that's second nature.

"My mouth, huh?" Reiner asks, still knelt beside the bed. He feel that shudder in Eren's body, and he presses another kiss, this time to the tender skin at the bend of Eren's knee. Another one, a little higher, moving up the inside of Eren's thigh.

He could get lost in Eren's legs for hours. Could lose himself kissing and nipping every inch of them, save for that tender skin at Eren's stump. That, he would just lick.

He does so now, licking the very edge of Eren's stump, teasing it with the tip of his tongue. His eyes are half-lidded as well, gazing up Eren's body—at his half-hard cock, his muscled chest, his enthralling eyes.

"Where do you want my mouth, Eren?"