Two bottles of wine later they left the restaurant.
Kat skipped out on Joe's arm, light-headed from the chablis he had been pouring down her throat for the past two hours. Walking down the street together she smiled to herself - what did they look like?
Joe steered Kat into his favourite department store, known for their private shopper facilities and their discretion. Taking the lift up to the top floor he looked at Kat, his cock stiff with lust, and tried not to tear her clothes off in the elevator.
The pair of them tumbled giggling out of the lift, Kat steadying herself on Joe's arm as he put it round her and casually felt her bottom. Christ it felt good, he thought. She felt his hand roaming freely across her buttocks. "Hey! Cheeky!" she laughed, slapping him away.
The personal shopper was a matronly-looking older woman who Joe didn't recognise and she peered at them.
"We're here to get this one kitted out in the season's finest," said Joe, his hand resting firmly again on Kat's arse. This time she let him keep it there.
"Certainly sir," beamed the woman. "And is this your daughter?"
Snooty cow, thought Joe. Where was the usual compliant bint they had on staff here?
"That's right," he smiled back. "Isn't it Kitty Kat?"
She looked at him. So this was how he wanted to play it?
"Yes daddy," she said, smiling back at him. She leant in against him and pecked his cheek, pressing her large tits against his chest.
The first few outfits Kat came out in were what he liked his PAs to wear. It was why he usually offered a clothing allowance - it gave him the control he needed.
She looked phenomenal; her curves poured into short skirts and tight white shirts. Kat could feel his eyes on her. All over her. She could see that the older woman overseeing them was a little uneasy. Which was kind of fun. Stuck-up bitch.
"What do you think of this?" she pouted, holding a glass of the complimentary MOET they had begun drinking as soon as they had arrived in the store's exclusive 'concierge' lounge.
Kat was wearing a tight red wrap dress, standing over him as he sat outside her changing room. She bent forward and put her hands on his knees, giving him a clear view of her cleavage.
"I like it a lot...baby," he grinned wolfishly, enjoying the charade they were both now relishing in front of the department store employee.
"It's for tonight. For my date with Dan" she said, watching him stare helplessly at her tits. She had him in her spell. Or so she thought.
"Lucky boy," whistled Joe.
"Will you buy it for me...daddy?" she smiled.
Joe smiled back. "Of course honey. On one condition: you let daddy buy you something to wear underneath it as well. I can't have my girl going out without any panties on, now can I?"
Kat felt again that sensation of shame and arousal. She knew this was deeply fucked up, that this old guy clearly wanted to fuck her brains out. But mixed in was her own private fantasy of wanting to let him do it. Of being taken and dominated by an older man.
"I'll take your daughter for a fitting and then show her some of our lingerie ranges," the store assistant said, clearly relieved to be interrupting the strange, charged atmosphere.
"No," Joe said firmly, putting his hands on Kat's hips and staring up at her. "We'll choose it together. Daddy wants to see what her boyfriend gets to enjoy."
"Of course sir" said the assistant, her face flushing all the way up to her greying roots.
"And you don't need a fitting do you baby?" Joe said. He ran his hands down her thighs. "Tell the nice lady how large those fantastic tits are. Come on, don't be shy."
"I'm a 36DD," said Kat to the woman, starting to feel wet between her thighs, turned on by the ownership that Joe had established and enjoying the twisted roleplay. This would definitely be her little secret. She might tell her friend Zoe. But definitely, 100% not her mum, or her boyfriend. As for her dad. Well, she had a new daddy now. And he was handing over his credit card to the flustered employee.
"Does Dan like you in stockings?" asked Joe, sitting back now, enjoying every moment. "That's what you're wearing today, right? And suspenders?"
Kat flushed and nodded. The naughty shopping trip with Zoe. She'd loved the feel of the tight black satin against her pussy all day. And her bare thighs above the stockings. It felt like she was keeping a secret all day.
Joe smiled. "Why don't you take that dress off for me and show the nice lady what you're hiding? Show her what she's working with?"
Her head spinning from the alcohol and (unbeknownst to her) the Rohypnol (Date drug) that was mixed in with it, Kat started to slip out of her wrap dress, much to Joe's enjoyment.
Joe sat back, grinning, looking up and down at his prize, a voluptuous teen goddess with the best body he'd ever seen.
"What do you think daddy?" whispered Kat, standing in front of her new boss in her underwear, increasingly feeling as if she was having an out of body experience.
"I love these stockings baby" said Joe, caressing her thighs gently. He ran his hand gently up her inside thigh until his fingers reached her suspender belt. The store employee stared, transfixed, as she watched one of the store's best customers slide his fingers between Kat's thighs and begin to finger her through her panties.