Use the wand and the vibrating nipple clamps.

You pick up the clamps first, the silver chain pooling cool in your palm. Rosaria's eyes track your movement, her chest heaving with each breath. The rumpled sundress clings to her, and you can see her nipples straining against the thin fabric.

"The dress - can you-", you ask.

She's already pulling it over her head. You help her, your hands shaking slightly, and then she's there in just the harness and the belt, her small breasts bare and flushed, nipples dark and achingly hard.

"Rosaria, you're-"

"Please," she cuts you off, her voice breaking. "Matteo, please, no more waiting."

You start with her left breast. The first clamp closes around her nipple. Rosaria gasps, her back arching, her hands flying up to grip your shoulders.

"Too much?", you ask.

"No," she pants. "No, it's - it's good, put the other one on, please-"

The second clamp. Another gasp, louder this time, and her whole body shudders. The chain hangs between her breasts, swaying with each ragged breath. The pieces start vibrating softly.

"On the bed," you say, surprised by the command in your own voice. "Lie back."

She scrambles onto the mattress, her movements clumsy with need. The harness rope frames her body, the collar gleams at her throat, the belt's metal surface catches the light between her thighs.

You kneel between her legs, the wand heavy in your hand. You thumb it on to the lowest setting and the hum joins the belt's persistent vibration. Rosaria's thighs fall open, shameless, desperate.

"Where?" you ask, though you know. You want to hear her say it.

"On the belt", she says.

You press the wand to her, just above the belt. Her whole body goes rigid. Her mouth opens in a silent scream. The vibrations from the wand layer over the vibrations from inside the belt and she's shaking, her hands fisting in the duvet, her hips grinding up against the pressure.

"More," she begs. "Stronger, please, I'm so close-"

You increase the setting. Her scream isn't silent anymore. It echoes off the walls, raw and uncontrolled. You reach up with your free hand and tug the vibrating chain.

She comes. Her back bows off the bed, every muscle tensing, and she's sobbing your name between gasping breaths. The orgasm tears through her in waves, her face contorts with the overwhelming release. You keep the wand pressed against her through it all, drawing it out, letting her ride every trembling aftershock until she finally pushes weakly at your wrist.

"Stop," she whispers. "Matteo, stop, I can't-"

You pull the wand away and switch it off. Rosaria collapses against the mattress, her chest heaving, tears streaming down her temples into her hair. The belt still hums between her thighs, relentless.

She laughs - a breathless, slightly hysterical sound. "It's still going," she says.

You look at her, sprawled and trembling, the clamps still attached, the chain rising and falling with each breath.

"Yes," you say quietly. "Why would it stop?"

You need to wait until tomorrow to change that.