Both, actually

"I'm a switch," Leslie replies.

You give her a confused look, which she catches and tries to rectify.

"It means I like being both. Some people, like Mariah here, are probably just one or the other. Me, I can be whatever you want, stud. How does that sound?"

"It sounds great."

Mariah nods vigorously from the couch.

"So, what do you want to do first?"

"I think you should get a taste of Mariah. I can tell how much you love those breasts of hers," you reply.

"Sounds good to me."

Leslie gets down to one knee and puts her face right near Mariah's. She kisses her lightly on the forehead and begins to work her way around her face. Her choices are somewhat limited thanks to the strap around her mouth, but she makes do.

She moves down lower, sucking a little on Mariah's long, slender neck. The young lady moans at her friend's minstrations. It is quite a sight to see.

Leslie moves further down, touching the top of her friend's breasts. She makes delicate kisses around the area, intentionally avoiding the nipples. She keeps this up for a couple of minutes, driving Mariah crazy. She moans sadly into her gag, which makes the busty redhead smile.

Satisfied in her work, she latches onto one of Mariah's nipples, eliciting the most moaning so far. Leslie begins to alternate between the left and right ones, which has a good effect on her friend. She practically purrs into her moistened panties.

After a few minutes, Leslie goes down further, paying close attention to the young woman's navel and midriff. As she gets close to Mariah's pussy, you get a devious idea.

You grab a handful of Leslie's hair and tug on it lightly.

"Hey, what are you doing?!?"

"Last time I checked, I was in charge here. You don't get her pussy until I say so."

A sly smile goes over Leslie's face as she figures out your game.

"I'm sorry, master. I won't lick her twat until you tell me too."

Mariah moans sadly into her gag, although her eyes give away that she understands the game as well.

"I think it is time that we tied you up a little, missy," you say.

"As you wish, master."

"But...I used all up my straps on your friend here..."

"You can get the ones from my car," Leslie says, "I keep a box full of stuff in my car at all times. Kind of like how you guys always carry condoms in your wallet everywhere you go."

"Good. Go get them."

"But...you have me in my underwear. People will see me."

"Then you had better go quickly," you say, "Besides, who is going to be looking at your face with that bra on?"

A sly smile goes over her face and she gets up. Leslie walks over to where she left her shorts and fishes out her car keys. She wiggles her ass at you and Mariah as she goes out the door.

While she is away, you pull Mariah up to a sitting position on the couch and sit down next to her. You lightly fondle her breasts while you wait.

A couple minutes later, Leslie scampers back in the door with a big blue box in her hands. She closes the door quickly behind her.

"I think a few people saw me. One of them had a camera phone, so I might become famous around here."

"Tell me who it is later and I may be able to get them to delete the pictures. In the meantime, let me see what you have."

She walks over to you and hands you the box.

"Yeah, this should do," you say, "Now turn around and I will get to work."