This is based on the story "My Mom is a Slut" by darkride (with the author's permission).
Chapter 21
A beam of sunlight to his eyes awoke Steven with a start. He felt Sandy still squeezed tightly into him, breathing gently, but his mother was gone. Sandy was lying on his arm and one of her legs was sitting heavily over his. He pulled out his arm as carefully as possible, but with barely half of it out, Sandy's eyes popped open and found Steven's face. "Morning, Master," she purred as a shiver ran down her spine.
"Morning Sandy," he said back casually, no force in his voice.
She frowned back at the interaction, "What's wrong?"
"Nothing. The rules Nathan and I set up mean we wake up in 'family mode'." Steven said smirking.
"Na ah. That only happens after we dress," she pouted and flipped the blanket off them, showing her nakedness. "I'm still in 'slave mode'," she said waggling her eyebrows.
Steven laughed heartily, then grabbed her face and kissed her roughly, "Okay, Little Slut. Crawl out of my room, get into proper clothes, and enter 'sister mode', and I'll meet you in the kitchen for breakfast."
"Come on, Master! Don't you want to fuck me in the morning?" Sandy whined.
"Slave!" Steven nearly yelled, "I gave you an order! I tried to do it as your brother, but if you want me to act as your Master, you'll be punished for this childish argument! This arrangement, where we're all here pretending to be normal is going to take a little time to get used to, but you're still my slave and you need to do as I say!"
Sandy looked abashed and also kind of horny, "Sorry, Mas... Steven."
"I love you, Sandy."
"I love you too, Stevie," she said with a smirk as she got out of bed, dropped to all fours, and crawled toward the door. Steven got up and opened it for her, watching her ass closely as she moved past him down the hall.
Steven quickly put on some running shorts and a simple t-shirt and headed out toward the kitchen. As he rounded the corner he saw his mother at the stove, frying some eggs. She was wearing a short, satin robe which put her long fit legs on full display. It was sexy and a robe Steven had never seen before. He wondered if his mom was also pushing boundaries the way Sandy tried to. "Good morning, Mom," he said putting extra emphasis on 'mom'.
"Morning honey," she said and moved over to him and almost kissed his lips, but switched to a chasted cheek kiss at the last moment. "Breakfast is almost ready, have a seat."
Steven took a seat and watched as his mother floated around the kitchen finishing the meal. Sandy came into the kitchen a few minutes later, wearing cute, tight, white, underwear with a cartoon character on them and a tank top that showed off most of her stomach. While Steven could remember a time or two when she walked around the house wearing something like that, it was the exception, not the rule. So, the question was, were his mother and sister teasing him and pushing boundaries, or was it that since nudity, sex, and sexuality had been so normalized over the weekend that they just feel comfortable like this now? As the Master-on-duty, Steven had to decide if this needed to be addressed. Maybe he should text Nathan?
Mom came over, bringing two plates of food, one in front of Steven and one in front of Sandy. Then she moved back toward the breakfast bar and just stood as she had for several of the previous meals over the weekend. Steven sighed inwardly, this could be going better. "Are you not joining us?" Steven asked cheerfully.
"Well, um, sir... Steven. Normally..."
Steven gave his sister's smirk a side-eye, as he addressed his mother, "Were you not told that after you dressed you'd be in 'family mode'? Was this not an order given by both Master Nathan and myself? Have you ever asked your 'son' permission to eat before?"
"Well, no, ah, Steven. I'm sorry." She said and rushed back to the kitchen for her own plate, then returned to the table and took a seat.
Steven let out a slight sigh and gave a small shake of his head, as everyone started to eat uncomfortably. "Alright, there are several large elephants in the room. Let's start dealing with them." He took another bite of food.
"I know you're both horny and 'want' to continue like yesterday," he smiled at each of them warmly. "I'm an 18-year-old male, so, of course, I also 'want' that! But, it's not what we all 'need'. It's part of my new role to give you what you 'need'. We 'need' to continue on with some type of normality; we have to go to work, to school, maintain friendships, cook, clean, to have some life outside these walls...
"Sandy, do you remember what I said, that I loved you as a sister and a best friend, but also hoped we could love each other as lovers? " he asked her.
"Yes..." she replied seemingly wanting to add an honorific.