She gets company to help her out.

"...pull up my contacts. I know who I can call," Leah says, her eyes turned down.
"Alright. Name?"
"Fiona."
"Got it. What would you say to bring her here?"

She tells you several key things to text her and then you wait.

'I'll be right there. Don't worry.'
You smile at Leah, who is still embarrassed.

Several long (for Leah) minutes later, Fiona pulls up.

She's a young, cute thing in a black tank top and jean shorts. She has part of the right side of her head shaved, giving her a unique look.

She goes over to Leah and hugs her, not bothered- it seems- by her being naked.

"Tom," Fiona asks simply.
Leah nods.
"Okay, so how do I help make this right," she asks bluntly, looking at you.
"Join her in nudity and then you can both come inside with me."

She nods assertively and strips naked while you watch.
Leah is not that surprised.

As a show of faith, she hands you her clothes through the partially opened door and lets you stash them somewhere first.

Once you return, you let them both inside.

"Are you a..." you start to ask.
"No," Fiona answers quickly, "But she knows that I want to be. That's why she called me, I imagine."
"Very well. Show me who- in this case, purely metaphorically- wears the pants in this relationship you would like to have."

Fiona whispers in Leah's ear and she nods somberly.

They go to a nearby wall and Leah sits on a stool.
Fiona goes up next to her, her pussy by Leah's arm as it goes under and around her leg.
She puts her hand dominantly on Leah's head as they both look at you.

"I see. Very nice. Show me what you would do with her then."

Fiona smiles.
Leah gulps.