Arthur awoke rather suddenly and with greater clarity than he usually did on waking. His eyes were open, and the afternoon light was smacking his face. He was lying on his side on the sofa with his naked back pressed into the cushions in Selene and Katerine's apartment. Short, curled, blonde hair was just under his chin, his arms were wrapped around someone soft and pleasant to hold, and her body was pressed against his with his now hard cock wedged down and nestled in the valley between two round ass cheeks that were gently red and warm to the touch. He stirred gently and felt Katerine yawn and press further against him. Her hips pressed her back, pushing his rod further into the valley of her ass. His fingers flexed, groping her breast as they did so, and her nipple instantly hardened against his palm.
"What a pleasant way to nap." Katerine cooed as she nestled against him still more.
"Mmm." Arthur rumbled as he exhaled. Then his eyes snapped wide. "What time is it?"
"Hm?" Kat asked, still waking up. "I don't know. I left my phone over there." She gestured weakly with her arm behind them and the sofa they were lying on to the kitchen table where the remnants of their lunch remained.
Arthur looked around, but there was no clock on the wall or immediately visible display of the time. The only indicator that it was still Saturday was the sunlight coming through the window. He didn't know how long they'd slept, but it didn't seem as though it'd been very long. At least, he hoped it wasn't. When he'd come here for his lunch date with Kat, he'd left her sister, Selene, back in his apartment across the parking lot, drilling her mantra as she edged and denied herself - keeping track of how many times she'd almost cum. He was recording her exercise on his phone, which he'd left there, so he couldn't check it now.
He patted Kat on her hip, which she took as encouragement as she pressed back against him, stroking his cock with her ass cheeks as she clenched them around him.
"Wow." Arthur commented in surprise.
Kat bit her lip and shifted her hips as she stroked him with small strokes. "Are you gonna teach me how to take that monster of yours in my ass?" Kat asked.
"Yes." Arthur admitted immediately. "Though, I wasn't planning on doing it right now."
"Well, duh." Kat chuckled. "But is this nice?"
"Very nice." Arthur admitted. "But..." He hesitated.
"You need to get back to Selene?" Kat asked.
"I at least need to see what time it is." Arthur said with a slight chuckle.
"So, is my evaluation over?" Kat asked as she reluctantly swung her legs forward over the edge of the sofa, sat for a second, and then stood up.
The cool air struck his front as she moved away, making him miss her warm flesh. "Well, anal and actual lovemaking are the only two things I haven't scored you on." Arthur shrugged as he sat up and watched her naked body with all her curves and rose-tinted ass cheeks move away so that he could stand. His dick was as hard as steel, but he stood and looked for his clothes so he could put them back on.
"I can think of a few more things." Kat said with a smirk as she rounded the sofa and headed toward the dining room table so she could check her phone.
"Oh?" Arthur mused as he found his boxers and picked them up off the floor.
"Some physical things, like flexibility, strength, endurance - that kind of thing." Kat explained. "And some pleasure-based things, like... foreplay skills, seduction skills, modeling, dancing, the list goes on. Your evaluation of me so far seems... incomplete." She said with a smirk.
"I guess we'll have to fix that." Arthur smirked as he slid his boxers up his thighs and had to adjust his still-hard cock so that it protruded through the open slit in the front.
"So class is still in session?" Kat asked. Arthur didn't know her well enough to determine if she sounded hopeful, but she didn't sound like she hated the idea.
"See, this is why you need a collar." Arthur scoffed as he picked up his shirt. "Put it on when we start, take it off when we're finished, and no one has to guess. We just have to look at that pretty little throat of yours."
"Hmm." Kat smirked but didn't answer as she looked at her phone. "It's three-twenty-four."
"Oh geez." Arthur sounded more alarmed than anything else as he started moving quickly to try and throw on his clothes.
"What?" Kat asked.
"I uh..." Arthur looked over his shoulder to the front door and frowned. "I left Selene doing an assignment when I came over here. I didn't think I'd be over here this long."
"I don't have any messages from her." Kat thought for a moment. "Is she tied up?"
"No. I never would have left her like that. She's edging herself and keeping count."
Kat bit her lip as she watched Arthur get dressed. She was still naked, standing there with her hip jutted out toward him and her bare feet flat on the kitchen tile. "That must be driving her insane." Kat could hide the smile from her face but not from her tone.
Arthur nodded as he threw on his shirt.
"What are you going to do about Excalibur there?" She asked and pointed to his dick as Arthur tried to stash it into his pants and close them up.
"I'm trying to think of nuns and baseball, but it's not working." He almost laughed. "You're too hot and naked for me to think about anything else or for this to go down any time soon."
"Should I suck you off before you go?" Kat asked with a smirk as she stepped forward, as though she were eager to try. His dick twitched in response, so she assumed that was a yes.
"No." Arthur shook his head as if in direct contradiction to his actual desire. "I-" He hesitated, unsure how Kat might feel about what he was about to say, but said it anyway. "Selene will want to suck it with your juices still on it. She-"
Kat raised her hand as if to concede. "Yeah. She mentioned something like that when we talked about this." Kat shrugged. "She's certainly become a depraved little slut under your guidance. I never knew she was half as kinky as she's turned out to be."
Arthur chuckled a little. "It was a surprise to me too."
"So what should I do?" Kat asked and looked up into his eyes for the first time. "Come with you?"
"You're welcome to." Arthur nodded. "Or we can end our session here for today."
"What should I wear to cross the parking lot?" Kat asked.
"Hm?" Arthur asked as he fastened his belt.
"That was the rule, right?" Kat asked. "You pick what I wear when class is in session?" She gestured to her bedroom. "You want to pick something out for me?"
That reminded him. He was supposed to grab clothes for Selene too. "Got a long t-shirt?"
"Yes." Kat answered. "How long?"
"Put on one that just covers you - and I mean just. I want you in danger of exposure if you take too long a stride." Arthur smirked.
Kat's gaze darkened, and he wasn't sure if she was thinking about the risk or what garment to choose as she stood there and closed her phone. She looked up at him. "Okay." She said after a moment. "And?"
"Nothing else." He shook his head.
"No bra, no panties, no shoes?" Kat asked. "Shorts?"
"Your tallest heels." Arthur answered.
Kat frowned. "You want me to walk across the parking lot and climb three flights of stairs to your apartment in nothing but a pair of heels and a t-shirt that barely covers my ass?"
"That is what I said, isn't it?" Arthur asked as he stepped forward. Closing the distance made her tilt her head back to keep his gaze, and he towered over her. He was more than a foot taller than she was and much stronger built. She was tiny by comparison, but feeling small with him was still a new sensation to her, and he wasn't sure if she'd like it.
"Yes, sir." Kat said after a moment, but she didn't look down or away from his face. "That is what you said. I'm just not sure I want to. What if I want to come back here?"
"Bring a change of clothes with you. Whatever you want to wear when the session is over." Arthur shrugged.
Kat frowned. "Can't I just go in my normal clothes?"
"If you want to disobey me." Arthur shrugged. "Sure."
She narrowed her eyes as she watched him for a moment. "And disobeying you means I have to take a punishment or something, right?"
"Right." Arthur confirmed with a nod.
"Like a spanking." Kat suggested. She rubbed her pink rose-colored ass gently with one hand.