"That felt good" said Rose "Really, really good. I think I'm going to love being a wereunicorn."
"It is great."
"I'm curious. Since we discovered the vials, my sister is my brother and my brother is my sister. They both seem very happy. That seems to be a thing, like I'm the only person I know who is the same sex in both my original form and my altered one."
"You're about to ask me if I was female as a human?"
"If it's not too prying. I don't even know what the etiquette is around these things."
The male snorted with laughter. "Considering that you have done me the honor of allowing entrance into your magnificent body, no, it's not too prying, and yes, I was a female human, and yes, I've noticed that too. It's like everybody's curious about being the opposite gender, and the vials make it a good experience."
"So what's your story? The unicorn vial in my set made it so that you stayed the sex you were."
"Different sets are different. I've always loved unicorns, and the only unicorn vial in my set was for a male unicorn. But I love it. After 90 years in a female body, this is just amazing."
"You were 90?"
"Yes, and dying. The vial was my last hope, but I have to avoid changing back to human."
"Wow" said Rose.
"So have you picked out a name for the baby?"
"WHAT?"
"I'm sorry, I thought you knew that male unicorns always make their female partners pregnant. You mean you didn't know?"