First cuckold experience

You remain in her house, a discreet yet elegant apartment, with everything prepared for this intimate game. Your girlfriend looks sexy, wearing a miniskirt, low-cut top, and heels; you stand beside her, already punished with the chastity belt under your pants. You know today you're not the protagonist, you're the cuckold, the accomplice, the humiliated spectator.

The door opens, and he's there: the mature man, arrogant smile, well-groomed beard, fitted shirt showcasing muscle and authority. He invites you in, greets you with just a nod, and focuses all his attention on your girlfriend, as if you were just a package she brought along.

"So, you're the princess I've been wanting to... get to know deeply," he says, looking at her without disguising his desire, and she smiles, nervous but excited.

"Yes... it's the first time I..." she starts, but he interrupts, standing right in front of her, lowering his voice.

"No rush, just desire. And your boyfriend..." he throws you a quick glance, from head to toe "...knows the rules perfectly, doesn't he?"

You nod, feeling the humiliating belt pressing harder than ever.

He offers her a drink, and gradually, he starts making comments, giving her looks, getting closer than usual to your girlfriend. He touches her hip, caresses her arm, whispers things in her ear while leaving you in silence, watching, swallowing hard.

"Come, sit here with me," he asks, pointing to the sofa, while leaving you in a chair, apart, but with a perfect view.

She obeys, he pushes her hair aside and gently bites her neck. She moans softly, you see how his hand goes up her thigh, putting fingers under her miniskirt. The situation overwhelms you, desire and jealousy mix, and you instinctively touch the belt, feeling the punishment.

He looks at you and smiles, arrogant:

"I hope the cuckold doesn't get nervous. Here, we just watch and learn."

Your girlfriend dares to look at you, bites her lip, and giggles softly. "I'm fine," she whispers almost voiceless, knowing that will excite and destroy you even more.

He lays her down on the sofa, lifts her skirt, and opens her legs. You, from your side, see how he pulls down her panties, sniffs them, smiles satisfied, and puts them in his pocket. She breathes quickly, a mix of nerves and desire. The mature man opens her legs and kneels in front of her, starts licking her without mercy, while glancing at you, enjoying your reaction.

"Do you like how I'm treating her, cuckold?" he asks, not stopping his relentless licking.

"Yes..." you manage to say, your cock trapped, absolutely powerless.

"Next time, I want you to watch me fuck her thoroughly," he says directly, marking his territory.

Then, he pulls out his cock and makes her kneel in front of him. She, already lost in the thrill, looks him in the eye and takes his cock in her mouth, not looking away from you. ...