Thank her for every single thing she does to him

"Your next task is simple. Simple enough even a fucking human can do it: no matter what I do, thank me for it, and beg me for more." Just the sound of her husky, rumbling voice made Tom shiver in pleasure. She was utterly in-control and they both knew it, they both loved it.

Nodding his head, he told Sarah, "O-of course, mistress. Anything you d-"

Before he could even the finish, she sprung into action. Namely, by moving her hips forward to engulf his cock into her pussy. There was no way anyone could claim that he was fucking her. That just...was obviously not the case. No, she was absolutely destroying him. There was no mercy, no building up to it. She slammed her pelvis into his over and over again, each time taking his length like it was nothing to her, with enough strength that he was sure it would leave bruises.

As she fucked him, Sarah pressed the rest of her body to his, engulfing him with her size and smell and strength. "Did you already forget what I told you?" she growled.

Realizing he was already messing this up, Tom stammered out, "T-thank you for fucking me, mistress. You honor my p-p-pitiful human cock by letting it enter your orc pussy, and I would do anything for you in return for your continued affection!"

She responded to his groveling with a long rolling laugh, the sound deeper than any that he'd heard from Sarah before in his life. "That's more like it. The thing is, you've still yet to really see what I can do with it. Enjoy this treat, human." Then, a brief expression of concentration took over her face, and Tom felt something new.

It took him a few seconds to realize what it was, seconds he spent in blissful perfect pleasure. Sh-she's massaging my cock with her pussy muscles! It made a perverted sort of sense: she was muscular in every sense of the word, so why wouldn't that extend to her cunt? He was so lost in the feeling of being pleasured while she ground against him that it took him a few seconds to remember what he had to do. "T-thank you for massaging my cock, mistress! I'm not worthy of this honor, but I would b-b-beg you on my hands and knees to feel it again!"

She pointedly stopped the grinding and massaging, going back to thrusting against him, and smiling down at him with her tusks looking dangerously sharp so close up. "Of course you'll thank me when it's things you like. But how about this?" Then, she raised her arm up, exposing her thick underarm hair, and shoved his face into her armpit. "Lick it clean, you piece of shit."

There was no hesitance, no resistance. She'd completely eroded that, he ached to obey her every command. The armpit reeked more than any other part of her, but he didn't care. It didn't matter how strong the smell or the taste, he dug in and licked every drop of sweat, and when he was done and she moved his head to the other arm, he repeated it, and croaked out, "Thank you mistress, thank you, I love your smell, I love your sweat. But what I think, what I love, that doesn't matter, what matters is mistress!"

Saying that, admitting that, finished him off, his cock twitching inside of her and shooting his human seed inside of her. Her expression went from pleased to pissed. "Did I say you could cum, you worm?" He quaked with fear and arousal, and got some relief when she grinned at him again. "Well, I suppose I can't blame you. After all, you worship me. And you should. Still, you have to be punished. And this time, your punishment will involve the coin..."