Seems like you have to

Apprehension takes hold of you. You knew this was risky, but you hoped not to catch too many eyes too soon. But here you are, with someone clearly picking up on your ruse being just that: A ruse, transparent and ineffective. He does not need to say it out loud for you to know that if you don't play old friends with him or someone else right now, you are not walking out of here a free woman.
Thankfully you are an expert at your craft. Immediately you turn your expression to one of recognition. You smile, mouthing a worthless hello and wrap your arms around him as if you've known each other for a very long time. He does not take his hand of your thigh, gently letting his digits roam over your leg, but never becoming too inappropriate. He's not pushing it, and it's difficult to tell if he actually just wants to grope you or puts on a show to make this all more believable.

"Just play nice. We can talk about this later." He says, giving you a wink and briefly pretending to talk about one of the woman being sold, mentioning her tits and making a crude joke about how she's only good for sexual services now, even though she used to be an executive somewhere. You're prompted to laugh. It's clear he does not think the joke is funny, but you need to pretend it is if you want to fit in.

It's an uncomfortable and agonizingly drawn-out time where you are literally imprisioned by his touch. More and more women leave the stage, carted off into some messed up collector's possession here or there. The ranks thin out, many customers leaving with probable cause after they made their purchase. You're barely paying attention anymore. Fear is a potent motivator. You're just playing flat-chested armcandy at this point. You know that it might be you on such a stage next if you get caught.

"Don't we....shouldn't we do something too?" You ask, still putting on that fake-lovey smile. He vaguely gestures at some of the remaining women. "We can make a bid. Guess I'd have to pay." He says, laughing but at what you cannot tell, "But if there's a buyout we'll have to stay longer, just so you know. Not necessary by the way. I'm not a regular but I'm trusted enough. My word's gonna keep you safe as long as you keep your mouth shut."