Hmm, medium

Nadia continued to grind into her messy pile of pillows as James rummaged through his bag. She watched him as he produced a watchmakers' monocle and bent over the side of the bed to look at her expanded ass.

"I'm glad I brought this." He said to himself as he looked closely at her rear. "It's a pretty skilled enchantment. I'm not sure how a non-magic would explain being hit by this one." He reached out to her jiggling ass and rubbed it lovingly.

Nadia squeaked. "Hey! It's sensitive! Focus!"

"Okay, okay! Where's the collar?"

"Over there in my bag!" Nadia was out of breath as she talked.

He went to get the collar, and as he brought it to her neck, he asked, "why were you even wearing it?"

Nadia looked about as shy as anyone can while gyrating in their beachwear. "I just wanted a break from the magic - a day truly by myself."

"It's dangerous to bring this thing out by itself! Do you realise how much the wrong people would give to have this thing?" He activated the collar on her.

"I know! I was careful. I just didn't think ... well, this would happen. What's the chance?!"

"Nads, it's literally your job to know the chance! Look, I'm going to have to bind your body so I can look at this. Hold on." He waved his hand at her and watched her body freeze in place mid-gyration, her back fully arched.

"Nhhnnhg!"

"Are you okay? How do you feel?"

"Well, James, I can't move." She said, grumpily. "And I really really need to."

"You can move your head.."

"That's not the part of me I want to move!" Nadia tried not to take out her frustration on him, but it was hard to reconcile being unable to move with a hot need to move.

He ran his fingertips along her ass cheek, admiring its shape.

"JAMES! Sensitive!" She yelled, fresh out of patience.

"How's that?" He asked, stepping back to look at her. A part of him wanted to keep her like this.

"Ten times better, thank you. I still have an itch to do it, but nothing like I had before."

"I had to dampen it rather than remove it. Whoever did this was actually pretty talented. I've left the ass growth and sensitivity because it would take me all night to undo, and it'll all have faded in the next day or two anyway."

"Day or two?!"

"Also I kinda like it."

Nadia laughed, "When you unbind me I'm going to strangle you."

"If..."

She turned to glare at him.

"I could stare at you all night. You look like a piece of art like that," he said to himself, thoughtfully.

"James I'm not in the mood. What are you thinking?"

He smiled evilly, pulling out a familiar chocolate ball from his case.

"I am not putting one of those things in my mouth after today - I just came five times!" She called them 'horny balls' - a chocolate biscuit ball that made the eater unbearably horny until their next orgasm. The perfect treat to let loose after a long day at work; not what she needed right now.

"Maybe you're not putting it in your mouth... open wide!" He waved his hand and she felt her mouth open by itself.

"Uhuh!" She moved the only part of her she could - her head - to try to stop him putting it into her opened mouth, to no avail.

He waved his mouth again, forcing her to swallow and unbinding her mouth.

"What the fuck?!" She felt the familiar tingling below, confirming to her that it was what she thought. She estimated about five minutes until she was in full heat. "Another orgasm?!"

"Yes, but not yet! You had all the fun without me today."

"Not by choice!"

"Not my problem! You like it when I'm in charge."

Nadia knew he was right, even if this wasn't the best moment for it. "How do you plan to fuck me like this?"

"I'm not planning to ... yet. I'm hungry!" He chanted some words under his breath.

'I'm hungry too..', she thought to herself as her face freeze in place with the rest of her body. She then felt the room get very cold, and seem to grow around her. As she realised that he was 'statuing her' (another phrase she'd coined), a mix of emotions hit her in succession. The first was rage, because this meant she was going to be stuck like this for an indefinite time. The second was arousal, because as annoying a moment as this was, she always loved the feeling of objectification. The third was more arousal, as the chocolate took effect, and the fourth was rage again, as she realised she'd be dealing with the effects of the chocolate until she was freed.

James smiled as he looked at his quarter-size marble partner in the most sensual pose he'd imagined: her back was arched, thrusting her beautiful breasts forwards, her hands on her knees as she knelt, her head tipped back. He removed her now loose underwear from her and carried her to the table, where he placed her down gently. He ran his hand over her ass, knowing that it would drive her mad in her prison. "Actually, maybe you should have a better view."

As he carried her frozen body, Nadia's world moved around her. She was helpless to stop or even comment on it. He rested her on the windowsill, facing out towards the sun as it set over the city.

Mercifully, he'd sped up her perception of time, so it felt like she watched the sun set and the city lights illuminate, even though it might have been several hours. It was beautiful, but not enough to keep her mind from the damn arousal.

She heard the door opening, relieved that James was finally coming back to set her free. She tried to call out to him, but of course, was unable to make noise. She was glad she hadn't when she realised that there were two people behind her, shuffling about with the bedding. She was as disappointed that it wasn't her captor returning to liberate her, but she was more concerned that two strangers were about to see a particularly lifelike marble statue of her in an erotic pose.

Her fears were realised when she felt the world move as one of the maids picked her up, presumably to dust underneath her. When they proceeded to dust her ass with their feather duster, she wished she could scream from the sensation coupled with her enforced arousal.

Her heart skipped a beat as the one holding her picked her up to make a joke about stealing the statue, but luckily the other maid pointed out that it was way too erotic to display in their house.