Mark had never been naked outside like that. Mistress Amy had always forced them to do whatever act she depraved act she desired in the privacy of their apartment. But not that day. Oh, no.

Mistress Amy had told him and Jill that it was National Nude Day. Mark strongly suspected that that wasn’t a federally recognized holiday. He also strongly suspected that she was just using that as her excuse to get them outdoors naked – and he was quite right. Not that he would do anything about it. And not that Amy really needed the excuse.

Mark was twenty four and his wife, Jill, twenty six. They’d been married for two years when Jill met Amy in a group on Facebook. At first, the chit-chat was fairly mundane as the group was aimed at sharing “household hacks” but then they started talking in private which was when Amy slowly, gradually brought up more intimate, more private topics. Eventually, every aspect of her sex life with Mark was discussed. And yet, Jill still knew nothing about Amy. Not yet, anyway.

From her willingness to divulge details, Amy figured out that Jill had a submissive streak and loved to be dominated. Mark, unfortunately for Jill, was also a submissive. Amy, however, was not.

Amy invited herself over to their apartment one day. No, that’s not quite right. She simply demanded the address and came over. ‘Invited’ implied that Jill or Mark had a say in it.

When she arrived, Jill smiled broadly at, what they then learned, was the 19 year old red head. At first, Jill just thought it was a friendly visit. Amy didn’t smile as she came inside.

“Strip. Right now,” she had ordered Jill once the front door was barely closed. Jill was taken aback by the command and just stood frozen. Amy took a step forward and grabbed hold of Jill’s pants. She started to unbutton them when Jill reached down and put her hands on Amy’s. Amy just stared, unblinking into Jill’s face. Her hands neither pulled away nor continued as the two woman stood face to face in silence.

Eventually, Jill let her hands fall free to her side. Amy smiled and resumed undoing her pants. Jill stood stock still as Amy slid them to the floor, exposing Jill’s panties. Amy saw the tell-tale wet spot in the middle that she’d been hoping for.

“Are you a good girl?” Amy asked her with a smile. Jill swallowed and nodded.

“Tell me,” Amy said.

“I’m a good girl,” Jill said softly.

“Say: I’m a good girl, Mistress Amy,” Amy said. Jill paused for a beat.

“I’m a good girl, Mistress Amy,” Jill said even more softly.

“Prove it,” Amy said. “Good girls follow orders. Pull your underwear off and place them in your mouth.”

Another beat. Jill had never done anything like that but the burning in her privates couldn’t be denied. Slowly, she bent over and slid the panties to the floor, exposing her bare pussy to the younger girl.

She slipped them off her foot and bunched them into a ball. She stared at the ball for a long while, unsure if it was something she could go through with.

Amy, for her part, merely stood, arms crossed over her chest, as she waited for Jill to comply. And, eventually, Jill did. The damp panties went into her mouth.

Jill had never tasted her own juices before; it wasn’t pleasant exactly, but not awful either. It was… different.

“When does your husband get home?” Amy asked.

“Mmm mmmbt mm mmr” was the best Jill managed. Amy pulled out her phone and handed it to Jill on the text message screen. Jill took it and typed.

‘In about an hour’ it said. Jill was about to hand the phone back when she pulled it away and added ‘Mistress.’

“That’ll work,” Amy said as she read the phone.

“Get down on all fours, slave,” Amy said, pointing to the floor in front of her. The word “slave” took Jill by surprise and she hesitated, but only for a moment. She took up position in front of Amy as instructed and waited.

Amy circled around Jill like a panther staking out its prey. She squatted down behind Jill and placed her hands on Jill’s ass cheeks. Jill jerked forward involuntarily; that action earned her a swat on the ass.

“I didn’t say you could move!” Amy said fiercely. Once Jill settled back down, Amy resumed kneading Jill’s cheeks. They were softer than Amy expected; Jill’s body was otherwise fit and trim.

Amy released Jill’s cheeks and used her hands to spread Jill’s legs further apart. Jill did ‘t resist. A moment later, Jill gasped as Amy’s index finger slipped between her slick labia.

“Well, well, well,” Amy said. “I guess you ARE a good girl!”

Jill blushed but said nothing.

“I want you to touch yourself, slave. You are to saw those fingers in and out of that beautiful pussy of yours. Push them in, be sure to twist them as you do. I want you to get that snatch good and hot for me. You are NOT to orgasm. Do you understand? Absolutely no cumming without permission. Repeat that back to me.”

Jill was panting as her fingers in and out of the wet folds between her legs.

“I, I, am not, not to cum, Mistress,” she managed.

“Exactly. Now I am going to go sit on your sofa and go on my phone. You are going to continue masturbating until your husband returns,” Amy said. She sat down and proceeded to ignore the older girl playing with her pussy on all fours ten feet away.

And Jill did masturbate as instructed. She had to slow down her pace to keep from going over the edge and once she stopped entirely. Amy who had seemed like she wasn’t paying attention turned and frowned instantly. Jill immediately resumed her manipulations as the wet spot on the carpet below her continued to grow from her vaginal secretions flowing down her thighs.

Finally, they both heard the apartment door unlock and watched it swing open.

Amy said nothing as Mark entered. He saw Amy first and started to ask something before he saw his naked wife on all fours playing with herself.

“Jill?! What the hell is going on? And who is this?” Mark exclaimed.

Amy stood up and walked over to Mark. She extended her hand in greeting which Mark instinctively accepted despite his shock.

“Hello, Mark, I’m Amy. But your wife calls me Mistress Amy. Did you know your wife was a submissive?” she asked. Mark simply gaped at his wife.

“No,” Amy answered for him. “Based on your expression, I’ll guess that you didn’t. Anyway, your wife has been masturbating for nearly an hour. That’s why she’s covered in sweat and trembling like that. Would you like to fuck her?”

Mark still didn’t answer verbally but nodded without taking his eyes off Jill.

“Great!” Amy said. “Just one thing. Before you are allowed to fuck her, you’ll need to submit to me as well. Because slave Jill is only allowed to fuck those that I give her permission. So, if you’d like that to be you, you’ll have to become my slave, too. Will you do that, Mark?”

“I, I don’t….” Mark trailed off without completing a coherent thought.

“Take off your clothes, Mark,” Amy said.