You let out a small moan as the Umbreon's thrusts hit just right, sending fresh waves of pleasure through you. Your walls begin to clench around him again, the sensation driving him onward in his quest for release.

The humans in the lab watch with bated breath, their own bodies reacting to the primal display before them despite their best efforts to remain detached and analytical.

Finally, the Umbreon's hips buck wildly as he lets out a hoarse cry of release. His seed spurts deep inside you once more, filling you completely and leaving both of you utterly spent. The lab technicians wait for a few moments to pass before gently unlocking the cage and allowing the two Pokémon some space to recover.