Big money, no whammies.

"Another $500..." you swallow hard. She stops, looking expectant, and maybe a little fearful. "If you show me that pussy."
You full expect her to hit the brakes now. An office BJ is one thing...
She stands up slowly, turning around to lift up her skirt. She reveals her pretty thong, thick thighs and round ass, and then bends over slowly as she peels off her underwear.
"Done!" She looks back and winks. She steps out of the panties and stands wide, bending over to reveal her neatly trimmed pussy.
"Wow..." you reach up to rub that beautiful snatch, finding it already moist. You probe a finger inside, and are pleased to find it nice and tight.
"That...oooh....that wasn't part of the deal."
"another $1000 on top of everything else, if we can cut the bullshit, Kayla." You grab her ass cheeks, pulling her down until your cock is resting against her labia, rubbing her lips up and down along it....
"Ooooooh.....make it $1500 and I'll fuck you real good, James."
You don't even bother to reply. You simply push her torso forward, bending her at the waist until the angle is just right, then pull her down on your waiting cock.
"Oh my...Ohhhh....It's.....It's been so long..." she starts gyrating, grinding and bouncing on your dick in turns, her hand is furiously working her clit as she ruts on your cock like a bitch in heat.
"You like that dick, don't ya?" You cup her tits and pull her tight with every thrust.

"I love this dick, James. I knew you had something good down there..." she turns, straddling you, and re-inserting your cock into her quivering pussy. You can't really tell if she's just playing the part, but it's obvious that she's been in need of a good dick.
"There hasn't been anyone since...?" you groan as she rides your cock with fervor.
"Just Ms. Fingers and Mr. Pink Rabbit. Took a guy home here and there, but I always chickened out..." she strokes your face..."they weren't...."
They weren't Frank.
But I am, or close enough.
You pull her into your arms, and with a grunt, you lift up off the chair. You nearly fall flat on your ass, but you maintain, walking her over to the couch.
"Oh wow...you're so strong...He never..."
"Do me a favor." You drop her onto the couch with a grunt, spearing inside as you do. "Shut up about my dad." Not unkind, but not gentle either.
"Yes, sir." she pants as you drill deep into her pussy. "Oh, fuck...James...."
After another minute of glorious, illicit sex, you boil over, and Kayla has you pull out, taking your spurting load straight down her throat, and swallowing.
"Can't have any mess, can we?"

She finishes up and starts to redress, leaving you panting on the couch, shorts around your ankles.
"So..I'll transfer the money to your account tonight."
"Thank you, James. You're saving my ass." She smiles as she fastens her bra and pulls on her sweater. She's sweaty, but besides that, nothing looks out of place.
"Well, it's an ass worth saving."
"Oooh, so romantic." she chuckles, and grabs her thong from the floor.
"No! I want those." You reach out for them. "For the money, I think I can keep a souvenir."
She looks at you with a measure of disbelief before tossing her panties to you.
"Pervert."
You stand, pocketing your prize as you pull up your shorts. You grab her by the back of the neck, and pull her into a warm, wet kiss.
"Tart."
You palm her ass, and then head out of the office.

You head home in the Javelin, contemplating your illicit deeds. Maybe you really are Frank's son in more ways than one. The thought fills you with a mixture of emotions. Exploiting Kayla for a little dirty sex had been so easy. You hope, somehow, that it doesn't get easier to do things like this.

You return home, cursing the amount of time you've wasted at the office as you hit an unexpected traffic jam. You're going to be late getting home, now. Jenna's gonna be hella pissed. Even worse, you realize that you didn't gas up, so you spend another twenty minutes trying to maneuver your way into a busy gas station. 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.