The lingerie store, of course

You take Stacey's hand (still damp from fingerfucking herself) and guide her to the mall's lingerie store. It's a boutique, and surprisingly empty for the time of day. A college-age saleslady greeted them. She seems to linger on Stacey's tousled hair and an odd glistening patch on her chest, but rallies, undeterred.

"How can I help you today?" she says.

"It's okay, we know what we're looking for. By the way, where are the changing rooms?"

The salesgirl purses her lips, probably speculating what you'd get up to, but points to a back corner.

As she walks away you turn to Stacey.

"Get some good underwear - including some bigger bras; you'll need those. But surprise me with a sexy outfit. Something too slutty to wear in public."

"Yes, master," she said seriously. Then the old Stacey breaks through, "You're going to make me wear it in public anyways, aren't you?"

You only give your own grin in response.

A couple minutes later she meets you by the changing room, holding a handful of skimpy clothes. Checking to make sure none of the salesgirls are looking you both slip into the changing room.

Stacey strips, a slow, entrancing tease. She shimmies out of her skirt, swaying her hips, stroking her hands up and down her thighs. Her panties are visibly soaked through. She peels off her stockings. She strips off her top next, involuntarily shuddering and nearly falling to her knees as the too-tight crop top scraped over her nipples. Her tits bounce down into view, her nipples hard and erect. Finally she pulls down her wet panties. Her glistening cunt comes into view. She hesitates a moment, visibly holding herself back from masturbating. With a deep breath and a shuddering sigh she looks at you.

"To make the new outfit a surprise, master, you'll have to close your eyes," she says.

Smiling, you indulge her.