Submissive as Chris was, Daren was getting ideas from the crowd's misplaced sense of blame. Why not make him really responsible for this perversion as everyone thought he was?
"You want this humiliation." he ordered under his breath as the passerby dispersed back to distant whispers now that Chris had been licked clean, as Darren pulled him off the table by his leash. "You're not so shy you won't do it in public on a moment's notice if you're too horny to care. You'll come up with degrading, creative ways to get both of us off, and even if you still try to deny being into it you'll tell me anyway in hopes I'll make it happen."
Unable to remove Daren's pants, Chris' hand rubbed him through them. "Let's do it." he said, uncharacteristically cold rather than embarrassed, having lost most of his shyness and too aroused to care. "Right here, right now, before I back out of this. Make me cum but it only makes me hornier or something, come on. I don't like it but I don't care, just fill me already."
"There's the inspiration I was hoping for." Daren said, meriting a cross glare from his slave. "Let's deal with that first. Nobody will mind if I'm doing anything sexual, and everyone can do sexual things about you without consequence. You can cum, but whenever you do you just get hornier for five minutes after the start of the orgasm. People might even find your indecency funny, and your cum tastes like candy. Be a good boy, or I might not let you cum again."
Chris came almost immediately on the words being spoken, meriting a follow-up order from Deren as splatters of seed fired onto his clothes as a result of extended orgasm. The crowd's whispers sometimes broke into chuckles and unconcealed masturbation.
"Aww, you made a mess." Daren commented, totally not taking responsibility. "Lick it up. You can quickly lick anything perfectly clean without hurting yourself in any way or getting dirty, so get to work. I'll finally fill your hole if you do a good job."
Chris begrudgingly leaned forward and licked off Daren's clothes, picking up at the unnaturally sugary taste of his own cum and leaving behind a perfectly clean outfit in seconds. Daren's following order of "You can take off my clothes and go fuck yourself." resulted in his pants being forced down and Chris practically slamming him against the table so he could ride a cock already. Chris gingerly eased himself down and struggled to be penetrated before miraculously easing the shaft in and starting to ride, stroking himself furiously in a loss of restraint. Another few squirts of semen fell on Daren's chest, but he didn't mind. He could always reverse what he didn't like later.
The audience dynamic and this extended continuous fantasy fulfillment finally reaching brutal physicality, soon Daren pulled at Chris' leash and pulled him into a forcible kiss as he came. Given that this was already ridiculously impossible and backed by reality warping, why not get some clothes to match?
"Chris, you're wearing a transparent black jockstrap that magically cleans up your waste and cum. Now you can cum all you want, still show off your privates, and have your hole free to access clean to go. Isn't that great?"
Chris just moaned indecently as he came again, his new clothing absorbing it without incident. Daren grinned, took a fingerful of Chris' cum to lick up, and wondered what else could be done with the boy currently plugged up by his cock.