She says yes, but finds his cock doesn’t do too much for her.

Putting a finger to her chin, Sarah didn’t look very sure. “Are you sure?” Gesturing down to her centaur body, she continued, “You really want to have sex with me while I’m like this?” Nodding energetically to make it clear how much he liked that idea, Tom watched her consider the idea more before giving an answer. “If you’re that interested in giving it a try, sure.” Then, she trotted into the bedroom, and he followed her.

Tom stripped out of his clothes, revealing his already rock-hard cock, and Sarah took off her top and bra, since her bottom half was already effectively naked. Looking at her ass, large and firm with muscle, covered with brown fur, with a soft tail over it, he brushed all that aside to look at her pussy. It was larger than it had been before, and definitely looked like any normal mare’s pussy. Feeling it gently, he could tell right away it was dry. “You’re going to need some lubrication,” Tom said, before moving over to her front. They started making out, kissing passionately, and it became pretty clear to him that, no matter what Sarah had said previously, she was interested to try sex in this body too.

The foreplay continued, with Tom’s hands roving over her body, fondling her breasts, and then going down her back, and stroking the fur on her horse half’s back. That made her shiver with pleasure immediately, and so he kept at it. After a few minutes of that, he broke away to look again, and found her pussy was soaking wet now. It was also, he realized a few feet higher than where his cock was. It took a little bit of maneuvering, with Sarah standing next to the bed, while Tom used its extra elevation to line their crotches up, but then he entered her.

It was immediately different. He was thrusting into her holding onto her horse ass as he did his best to fuck her with everything he had. But her pussy was so large, it wasn’t nearly as tight as it had been before. Instead, its warmth, its foreignness, and the very fact he was living out his fantasy by fucking a centauress, that was what kept him going. After a while, he couldn’t stop himself, and came inside her, filling her horse pussy with his cum. Feeling exhausted from the effort, he watched dazedly as she turned around to look at him, looking conflicted. “What’s up, honey?” he asked her.

Letting out an annoyed huff, one that almost sounded like a horse’s whinny, she explained. “Well, it’s all well and good that you got off, but I wasn’t even close. Plus...” It looked like Sarah was struggling to decide how to say what she wanted, or if she would say it at all, but eventually she blurted out, “...your cock is too small! This is a horse pussy, and a human cock is just too small for it!” That was a blow to his confidence, but he knew there were ways to help get her off.