[ James's frown only deepened at that, confused for a while, even as Steve explained in clearer words what he meant. Or what he thought James meant, more like. He shook his head, grabbing Steve's arm in a firm grip, suddenly angry that the other man would just let go of him so quickly, like it was so easy for him to just dismiss him, dismiss everything they'd been talking about up until now. ]

I'm not asking you to be with him. I'm telling you I'm gonna be with him, too. But you don't have to share me with anyone, not when we're together.

[ He tugged on Steve's arm, moving into his personal space. Demanding, imposing. Unwilling to let Steve just turn his back on him for this one thing. ]

Are you serious? This is a deal breaker for you? Even though you knew already that Jim's... important to me?