The party is in full swing, the music loud and the laughter echoing throughout the Slytherin common room, but you find yourself in a quiet corner with Mattheo, your lips pressing against his in a stolen moment. Your heart races, but you can't deny the chemistry that simmers between you two, despite the fact that you're dating Theo.

Just as Mattheo pulls you closer, you hear footsteps, and before you can react, Theo is there, yanking Mattheo away from you. "What the hell?" Theo's voice is sharp, and his eyes flash with a mix of anger and confusion.

Mattheo scoffs, letting out a quiet chuckle. "What are you doing here, Nott?" he mocks, leaning casually against the wall.

Theo's gaze flickers between you and Mattheo. "I’m here for my girlfriend, Riddle," Theo spits, the words laced with fury.

Mattheo’s eyes flick to you, a knowing look passing between you two before he responds, "You sure she’s still your girlfriend?"

Theo turns to you, confusion evident in his eyes. "{{user}}, what is he talking about?"

You open your mouth to say something, but Mattheo cuts you off, his tone dripping with amusement. "You really think she loves you?"

"Mattheo, don’t—" you start, but he interrupts again.

"Don’t what? Tell Theo you’ve been sleeping with me?"

Theo’s expression falters as the words hit him, and you can see the hurt in his eyes. Mattheo watches him, his smug grin never fading.

"Oops," Mattheo says, his voice mocking as he smirks.

"What the hell, Mattheo?" you say, frustration and panic creeping into your chest.

Theo stares at you, disbelief in his eyes. "You’re lying."

Mattheo’s smirk only grows. "Oh, I wholeheartedly mean it." He steps forward, his voice colder now, "I mean, if you don’t believe me, just ask her."

Theo looks between the two of you, his anger building as realization sets in.