There's just a few things running through James's head as Dante reaches for him.
One, he absolutely cannot be thinking about sleeping with a student. This rings in his ears loud and clear even as Dante trails his fingers teasingly over the growing bulge in James's pants, even as he spins the buttons on his shirt like it's a game to him. It doesn't matter that Dante is of age. It doesn't matter that he's clearly wanting it. He's a student. And that's nothing that James can mess with. The next thought...is that, two, he clearly didn't take enough of his blood replenishing potion if he's going to be so easily swayed.
The third is that he's completely and royally fucked because he greatly misunderstood his instincts when he begged Minerva for this job, and, four, that he'll more than likely need to be packed and ready to flee before the night's out.
"I can't play with anything belonging to you, Dante, you know that," he says softly, voice low and thick and more than a little husky. He sets the potion bottle on the nightstand where it won't be overturned and sits back on his bed, laying back on his elbows with his eyes pinned to the young man on the far end. "Can't stop you if you keep yourself entertained, though, can I?"
It's honestly pretty unsurprising when Dante completely misunderstands what James is hinting at. Really, speaking in riddles to kids who are high as a kite at the moment, trying to suggest that maybe they jack themselves off while James watches...yeah, he can see how the wires get crossed there. As Dante slides down to his knees James immediately leans up on his elbows, bites his bottom lip for a moment, isn't at all surprised when Dante goes for his belt and zipper.
Tell him to stop, James, he thinks as Dante tugs his trousers and pants down. Tell him now, he thinks as the cool air of the dungeons hits his bare cock. Tell him bloody right now, he thinks as Dante stares at his cock like an ice lolly and leans in hungrily.
In the end he only reaches to slide his fingers through Dante's hair and to help him lean in just a tiny bit faster.
"Fuck," he whispers the second that the other man's mouth envelops him, but he barely has a moment to get used to it - it's immediately clear that Dante isn't planning on teasing, not when he's going down on him with such electric enthusiasm. James barely has the presence of mind to thank Merlin for the silencing charm he applied to his chambers at the beginning of the year before he groans in appreciation, tilts his head back as he tries to catch his breath. Having over fifty years of sexual experience means that he can read every situation he ends up in accordingly, can predict what his partner needs from him, for the most part, and this is no exception. Dante is young. He's more than likely a little inexperienced. So James isn't shy about his audible responses to his ministrations, from moans and grunts to soft whispers, a quiet "Just like that, Dante, it's so good..."
But he also recognizes the fact that, no, he really doesn't have enough blood running through him right now, that his erection's going to start quickly dying down here as his body eats through all of his blood again, and he can't have that happening, can he? Can't have Dante noticing or questioning why. So when he opens his eyes and catches sight of Dante adjusting himself in his pants James moves in a flash, far faster than he should be able to, and grabs hold of Dante's torso, one hand on either side of his ribs, lifting him surprisingly gently onto the bed and rolling on top of him. As he presses his body flush against his for a moment, his muscular form nearly swallowing Dante's leaner one, he nips at Dante's neck with his lips. It's not enough to draw blood, not even enough to bruise, just to tease, just to try to bring the other man's attention to James when he whispers "Tell me to stop, Dante." Not when to stop or if to stop. Just to stop.
He's rather hoping the boy will comply and that it might trigger something in his vampire body, the same thing that keeps him from entering a home uninvited.