"Invite" her to join them

The presumed **** stops mid-thrust, and looks over his shoulder. "Well, well... look who's come to play! Break time, Katie..." Marian sees his leer, and turns to run as he pulls out and leaps at her. She sprints for the elevator, but turns at the last instant as she realizes the stairs are a better option. She hears him slam against the elevator door, and doesn't feel him closing in behind her as she closes on the stairwell door...

And doesn't see anything but a blur of red hair emerging from the stacks in front of her just as she trips over a suddenly extended foot. She catches herself with her hands against the door. She hurriedly scrabbles for the knob, but before she can get it turned a large, sweaty hand covers her mouth, and another grabs her wrist and pulls it behind her.

"Gddovvv mmmph!" Marian screams into the hand, and struggles with all her strength until her arm is twisted painfully.

"Now, now... you know nobody's going to hear you, and obviously you're not fighting your way out, so relax before I have to hurt you. Neither of us wants that, now do we?" Marian shakes her head, and the pressure on her arm lessens as he spins her around so she's looking down the stacks . "Smart girl. Katie, hurry up with that bag!" Katie returns from the direction of the spot where Marian found them, a backpack slung over her naked shoulder. It seems completely ordinary, except that it clinks rather more than usual.

Trying to distract herself from the bulge that's now prodding her ass through her skirt, Marian looks over Katie as she approaches. She's taller than Marian; perhaps 5'8" or 5'9". Her fiery red hair is in a thick braid that's slung over her shoulder and hangs down to cover one nipple. Her breasts are smaller than Marian's, but practically defy gravity. Like the rest of her skin, they are quite pale except for a smattering of freckles. She is, all in all, statuesque - and as she thinks of the word, Marian realizes she's seen the girl before: she's an art student, and modeled for a couple of (quite good) pieces in a campus show last semester.

Katie unslings the backpack, and it lands heavily at Marian's feet. She kneels to open it, and pulls out a roll of duct tape, looking up at Marian and her captor. "Not this time," he growls. "I don't want to mess up her lovely outfit. Not yet, at least..." Katie nods, and digs back into the bag, this time coming up with two pairs of handcuffs - one of which looks rather larger than what Marian thinks is usual. This larger one is quickly secured around her stockinged ankles. Katie then stands, and presses tightly against Marian as she reaches around her to close the other pair over her wrists, bunching her sleeves inside the steel. "I'm sorry..." she whispers, just before stepping back.

The man snaps back, "I'm not. Now, I'm going to take my hand away from your mouth. You're not stupid enough to scream, are you?"
"nmmph..." She shakes her head.
"Good. If you screamed, we'd have to gag you -- and you really wouldn't like what I'd gag you with."

He takes his hand away, and Marian gasps for breath before asking, in a quiet, quavering voice, "What is this? Wh-what are you going to do to me?"

He chuckles horribly. "Well... you interrupted us before we could cum, and you're going to have to apologize for that."
"Come? Come whe-- oh! I'm sorry, really, but-"
"Hah! It's not going to be that kind of apology. But before we get into specifics, we're going to have a photoshoot. Very, uh... 'tasteful'. But first..."
"First?"

"First, I'm going to have to make sure you're not hiding any surprises that might spoil our fun. Remember, we agreed on no screaming..."

Marian has difficulty holding to that agreement as he suddenly grabs her hips...