This is based on the story "My Mom is a Slut" by darkride (with the author's permission). Early chapters are very similar to theirs, before a major shift around chapter 8.
Chapter 5
Sitting on her bed in a knee-length skirt and tight t-shirt that clung rather nicely to her small b-cup breasts, Sandy no longer felt the need to wear something conservative like the night before. She couldn't believe what she just witnessed her parents doing; naked, peeing in their backyard, and then licking each other clean afterward. As they walked back inside, Master pointed out to her that her mother's pussy was wet, and it wasn't from the pee that her dad had just licked up. Her mom had become aroused from obeying Master, even at completing such a humiliating act, not to mention being performed in front of her own daughter. There was so much to unpack there.
When she finally heard her parents' door open, she slowly drifted out of her room in time to see Master lead his slaves into the hall. Her mother was wearing a bright yellow sundress with some low-heeled sandals. The inch-thick leather collar around her neck had been replaced with a thinner black choker, with a small charm dangling from it, a small hand. But there was something else about slave Maryanne that made Sandy stare, she could clearly see her mother's nipples pressing against the dress... and her breasts seemed to be much perkier than she had ever seen them, even in her best bras.
Sandy's father was wearing shorts in a similar shade of yellow and they were very, very short. Like his wife, he was wearing a choker of sorts; a leather band ran around his neck, and dangling from it, similarly to his wife, was a hand, this time made of pewter. As he turned around, Sandy saw something pink sticking out the top of his shorts.
"Dad, are you wearing... panties?" the teen blurted out. Her father's face confirmed her suspicion. Steven, who was lingering in the kitchen, took his eyes off his mother's breasts to look at his father after hearing the question. The slave tried to pull his shirt down, but it was purposefully short.
Steven said, "Dad! You cannot wear that. You look like an old man's twink sex slave." His voice was firm. Aaron blushed and looked over to Nathan.
"He is a twink sex slave," Nathan said just as firmly.
"And this is a 'local' farmer's market. If someone who knows this family sees him it will cause problems for us all. Would you please have him change?" Steven said.
Nathan looked at Steven and then at Aaron. "Very well," he said quickly after a moment. Little One, keep the panties, but wear something that your son would find appropriate."
"Yes, Master," Aaron said heading quickly back to the bedroom.
"Thank you," Steven said to Nathan. He just nodded back. Just 90 seconds later Aaron came back in wearing tight, but not inappropriate, khaki shorts and a short-sleeve button-up blue shirt that also hid most of the collar. "Acceptable," Steven said firmly.
"Come on everyone," Master ordered, and they headed out to the car, where slave Aaron popped up the two rear seats so everyone could fit, and as he bent forward into the car it afforded everyone a better peek of the top of his pink panties.
Slave Aaron drove, with Mistress Ericka next to him. Master Nathan and slave Maryanne sat in the middle seat and Sandy and her brother were in the far back. As they got in Sandy heard Nathan ask, "The ropes aren't too tight, are they?" Sandy thought the volume he said that was meant to be heard. Master Nathan and her mother peered down the front of her dress; making Sandy understand why her breasts were so pert.
"Oh, no, Master. It's perfect," Maryanne purred.
Once they got to the market, they got out of the car, and immediately Master Nathan grabbed Maryanne's hand, while Ericka grabbed Aaron's. Master walked around with her mother like they were lovers, occasionally he'd put his hand on her ass, occasionally under the dress. This caused Sandy to glance around nervously, worried about seeing someone they knew, seeing her parents this way. She was now quite glad Steven asked their father to change; he'd have stood out like a sore thumb in addition to the PDA. They were only twenty minutes from their home after all. The casual air that her parents were portraying walking around with their 'owners' left Sandy with no doubt that this public exposure was a regular occurrence for them.
After about an hour of wandering around the stalls, Master Nathan whispered something to her mother. Her mother in turn then whispered to Sandy, "Come with me to the bathroom." She grabbed Sandy's hand and pulled her along to a very basic toilet block. The two women disappeared inside. Sandy assumed she was simply having a pee break with her mom, but when she emerged from her not terribly clean cubicle, her mother called out to her from her own stall. Whilst Sandy was carrying a small backpack, her mother was not carrying anything with her. Opening her door slightly, slave Maryanne handed her daughter a length of velvety red rope and asked her to put it in her bag.
"Mom!" Sandy gasped, seeing her mother standing out in the open, dress down, exposing her breasts. One of which was still bound with rope, bound tightly around the base, causing the flesh to bulge out. The skin had a purple hue, while the released one was bright red as the blood began to recirculate and it started to return to its normal shape. Sandy moved herself to obstruct anyone from seeing her half-naked mother, although no one was in sight. "What did he do to you?" she asked in shock.