You've never actually told anyone this before. Saying it is like an admission of guilt, though you've done nothing wrong. Everyone has fantasies, and this is yours.
"You said a centauress. You can do that?"
Tonya responds, "Yes, and I know we can because we have already done so."
"What about a centauress with something extra?"
"Like what?" Tonya asks.
"Well, a working penis, as well as an extra set of arms."
"Hmmm," Tonya responds. "I know we like a challenge. The arms, we can find the components to get you extra arms from the same source as a merlith or naga. Some of them we've made with four arms or more. And you want to really be a hermaphrodite. That's easy, and fairly common."
"Well, almost. About my gender, I want to be clear, I'm asking not to be male at all, just to have a working penis of the right size for what I'm becoming. The human part, I want to be purely female and the right size. I want all the female parts where they should be. I want to be able to bear children. I want to be a girl. But, I still like girls, and I want to stay me."