Well... Surprisingly well

The guy is probably more than 6 feet tall and covered in tattoos on his left side. His arm, a quarter of his head which is mostly shaven aside from a short mohawk, and his pectoral. Which you can say because he's topless, showing off his impressive muscles. This guy is clearly working out, and most probably part of the football or basketball team. He's also wearing an expensive watch and has a shark tooth as a pendant. Amy suddenly catch your arm, expressing her arousal, and to be fair you have to admit this guy is quite handsome and you'd probably be in the same state as her if you didn't just fuck a dozen minutes ago. But more telling is Brianna's reaction. She's petrified mouth open, unable to say a thing. The driver flashes her a bright smile and exclaim loudly "Hi! Two of my pals just texted me about this place, told it was damn amazing! Can already say they weren't lying about hot chicks being hot."

While stating this fact, he ostensibly ogles at Brianna with a widening smile. It takes her a whole second to get out of her stupefaction and giggle. "Yeah, and we offer the best service on the whole campus and even the state!" she boldly assures.

"Told that too, them. Special services they said" The grisp of Amy's hand on your arm is suddenly more pressing, taking you out of your own torpor, and you suddenly realise she's trying to gesture you something with her head, pointing at Brianna and her customer. Then it shines on you from the way he looks at her that the two pals he was refering to most probably were Lucas and this other man you had sex with. Which Brianna can't possibly know but may find out quite abruptly. "One of them said he got head for one hundred, the other fucked the most gorgeous brunette ever for five. That you, hottie?"

You have to give it to her, Brianna doesn't flinch. She keeps her brightest grin while turning to you and venomously asking "Is that so?" before resuming to her customer. "I'm afraid it may have been my friend Lisa here, I was busy on the street until quite recently."

"Wait, means you're still fresh?" he asks in a joyful tone, most probably not getting a hint of what's happening between you. "Sweet! Tell you what, my pal Frank is clearly half blind because from where I stand he missed the prettiest brunette in the world and I wouldn't mind taking what he missed. Five hundred it is?"

You were afraid Brianna was about to lose her mind a few seconds ago, but now you're almost certain her smile is sincere. "Ooooh, sweetheart..." She opens the door and climb into the car, sitting directly on his lap, her thighs spred wide. "We're doing charity, here, you're giving whatever you think we are worth." she answers before slamming the door.

Amy and you takes it as your clue and start soaping the engine clean, but you have to admit you're not really focused on your task and regularly look at what's going on inside. From the angle you're at, you can't say wether the guy's dick is buried in your friend's pussy or ass, but she's clearly enjoying herself, resting her head on his shoulder and rubbing her back against his muscular torso. He slid his hands under her top and is currently massaging her chest. Her eyes are shut and her mouth half open, you can hear whimpers and moans coming out of her lips. At some point, she notice you staring at her from the other side of the nearest window and frown at you. You give her a thumb up and mimick a kiss, to which she answers by giving you the flip then turning her head to french the guy. You are brought to reality by Amy soapy slapping you on your ass. "Maybe we shouldn't lose sight of the wash part in this car wash thing, sis. Or should I calm your hormones down by eating you out?"

You giggle and wrap an arm around her neck, your lips getting closer to hers. "Maybe we should keep that for a customer who's into it?"

To your surprise, she answers by getting even closer to you, a defiant smile on her face. "Yeah, I'm sure we will find a market for that soon enough."

You are interrupted -and saved- by Brianna suddenly bursting out in loud squeels, as she obviously just came. It takes her and her lover a few dozen seconds to recover, which you take adventage on to finish rinsing the car, then she readjust her bikini and get out.

"It was amazing!" the guy exclaim. "You think I could see you again?"

She smiles at him and swiftly grabs the donation jar, shaking it under his nose to give him a look at the bills other customers gave us. "Maybe, sweetheart. I really like charitable guys, and you look really, really charitable." A look of confusion appears on his face, and she adds "Remember, there is no price set, you only give us depending on how happy we are with our service."

He suddenly burst out in laughters and get his wallet out, then start taking bills of one hundred out of it. One, two, three, four... At five, he stops and states "Couldn't be more satisfied if I got a phone number."

She seductively smiles at him and lean forward, through his window. "Got something to note?"