I completely forgot about this sketch until now! This was a follow-up to the pic where a human managed to somehow sneak into Arcee's ass for a little 'anal vore fun.'
All through the mission to infiltrate the Decepticon base at Tyger Pax, Arcee couldn't shake this feeling, this sensation of pleasure from her ass hole. She just couldn't fathom why it was happening, she hadn't used any of her toys that morning. She didn't think so, in any case.
When the mission was done, she returned to her barracks for stasis nap. After some nano-cycles, he broke free, evidently satisfied with the day... but all the stirring in Arcee's rectum as the human was released from self-made confinement woke her. She discovered the human, halfway sticking out of her butt -- which obviously came as quite a shock! Scooping him up, she placed him in front of her now-kneeling, towering form.
Confronting him about this, he merely said "Was it good for you too?" She couldn't deny that it was. After some time interacting, she began to wonder what else this human was good at pleasuring...