They get another (unwilling) Horse

Audrey is playing her part, prancing around while she's given instructions by her 'Owner' Kira.

The latter sees you and speaks up.

"This is a good horse. However, what fancy Equestrian only has one horse?"
"You need another then."
"Exactly. Can you get me one?"
"Of course. Text your Co-Star Peyton to come here and I'll take care of it."

She nods and does so.

You see the young lady coming down the street...

You consider your options...

You could try to trick into trying on the other Ponygirl Outfit.
You could knock her out and put her in it.
You could knock her out and let Kira have the honors.

'Let's go with the last option,' you think to yourself.

You welcome the confused Actress in and she's slightly-aghast at all of the fetish stuff here.

"Kira- are you here?"
"I'm in the back," she says calmly.

Peyton excuses herself from you and turns to go there...

You suddenly put a sleep mask over her eyes, which knocks her out instantly.
A simple, yet effective 'costume,' no?

You call out Kira, who smiles at you.

"Do you want to get your new horse ready here...or out at the Stables," you ask.