Car doors.

You hear the unmistakable sound of car doors shutting outside. Kayla's eyes bulge with fear, but you put the gag back into her mouth and grab her face with both hands.
"Don't you make a fucking peep."
She nods.

You head out into the office to see one of your site foremen, Kyle Ivanek, strolling into the office. He's about 35, slightly overweight, and his blond hair is receding into a tight widow's peak. Behind him, about a head taller and younger at 27, is Marcus Dawson. He's 6'2', black, and muscular, if a tad skinny. He's a good worker, and he's been with you about six months.
"Hey boss! Didn't expect to see you here today. We need to do some work on the blueprints for the Orangecrest job. Something wasn't quite right, and the estate agent is pissed." He looks around, puzzled. "Where's Kayla?"
An evil idea enters your mind. Before you know it, you start to explain the situation: Kayla's thievery, her willingness to make amends, and her current, tied up status in your office. Kyle and Marcus both have slack jaws.
"You're fucking me right now!" Kyle bursts out. Marcus slides over to the door of your office, and cracks the door.
"Holy... Kyle... he's most definitely not kidding."
"Guys, she wasn't just stealing from me. She stole from all of us." Kyle meets your eyes, and smiles. Marcus laughs behind you.
"God damn, Mr. Sinclair. You're an evil motherfucker."

The three of you enter the office, and you close the door behind you.
"Kayla, dear. Kyle and Marcus here know about your little... indiscretion now. I think you need to make amends to them." She shrieks against the gag as Marcus unbuttons his dirty work jeans, and Kyle does the same behind him. She shakes her head in terror.
"No?! NO?! You mean, you want to leave, walk out that door and out of this job, and a coinflip as to whether or not I call the cops?" She looks at the bulges in the two men's pants, then back at your face.
"NNN JMMMM..."
You pull the bandanna free.
"No...James...I want to be a good girl!"
"That's music to my ears, Kayla, and theirs too!" You glance over to see that Marcus has dropped his briefs, revealing an 8 inch black dick as thick as your own. A little jealous, you look back at Kayla. Her eyes are fixed on it.
"Kyle and Marcus are going to take good care of you for a little while, and you're going to be a good girl for them. I can't stay and watch, unfortunately. Busy busy busy."
Kyle is naked below the waist now as well, and his white dick is almost laughable by comparison at around 5 and 1/2 inches.
"Don't worry, baby." he grunts, "I'm a grower, not a shower."
They advance on her **** form from either side. Kyle wastes no time shoving his cock into her waiting mouth, while Marcus takes up a position behind Kayla's luscious ass.
"Ooof...I've been waiting to do this for years, baby." Kyle is pumping her mouth with a hand in her hair, and like a good girl, she's slobbering and moaning. His dick can't possibly taste good after he's been on a worksite all morning, but she shows no signs of complaint. Especially not when that 8 inch black snake slides into her cunt from the other side.
"Mnnnnn!!" her eyes pop, and then roll back. you stroke her hair. "I'm going to go now. Be a good girl." you turn to the guys. "Don't take too long, and clean up after yourselves when you're done."
"You got...ah...it.. boss."
"Sure thing, Mr. Sinclair." Marcus was very polite, even while drilling that white snatch.

You head home, with your head swimming. You curse the wasted time as you hit traffic, and then again as you realize that you didn't gas up the Javelin, and now have to find a gas station. Your annoyance is softened a little, though, by a sudden picture message... from Kyle.
It's a picture of Kayla. She's on her knees, and her face is glazed with spit and cum. In one hand, she's holding Marcus's dick. In the other, a little hand written sign that says, "I was a good girl, daddy." Her eyes are vacant, but she's smiling.

By the time all is said and done, you pull into your driveway to the sight of everyone on the lawn, hugging and greeting each other. God fucking damn it. You had wanted to be home when they got here.