Jace still can't believe that he's doing this, even as he feels Simon's mouth latch onto his neck. He closes his eyes, a low groan rumbling from his chest, when Simon chuckles against his skin and then begins to suck. The vampire's hand is braced against the other side of the Nephilim's neck, and the careful position of his thumb beneath his jaw stops Jace from being able to move his head at all. He's trapped even if he isn't helpless, and all he can do is surrender to the sensations Simon is sending through him.
He parts his legs willingly as Simon's free hand travels down his torso and grasps hold of his stiff cock. Tilting his hips up into his tight hold, Jace gives another groan - Simon's grip is absolutely perfect. It's like nothing he's ever experienced before.
Even as the raven haired Downworlder's hand begins to work him, his mouth doesn't move from Jace's neck. It aches along with the clench of his sharp teeth, but Jace doesn't tell him to back off - he doesn't even want to. With the slow friction from Simon's hand, he thinks he'd let the Vampire do whatever he wanted just to make sure it continues.
Simon pulls back when Jace is starting to forget how to breathe. His eyes are a brilliant shade of crimson when he looks down at Jace with a satisfied smile, his gaze lingering at the red mark he has no doubt left on the blonde's neck.
"Shadow Hunters are far more attractive than I had previously realised," Simon lulled. He leans back down, his hand continuing to linger against Jace's neck, but this time he kisses his mouth, forcing the Nephilim's lips open with his will alone and plunging his tongue inside.
Jace starts to lose his mind, shuddering apart, his body trembling and aching with need. His muscles flex and he draws Simon closer to him, his fingers scrambling against Simon's ivory skin - needing more contact, more bare skin on skin, more of everything that Simon offers. He'll take anything that he can get, thrusting up into Simon's hand, panting against his kiss for desperate, heated air.
He needed more.