Ngl this one accidentally turned out kind of similar to the jealous kiss I wrote for Malec... But hopefully you like it anyway. :)
21. Jealous Kiss - Simon/Isabelle
"Come on, Izzy, we're leaving," Simon growled, grabbing her hand and tugging her away from the dance floor.
Isabelle tossed her hair over her shoulder and frowned. "But Simon, we were having so much fun!" She twisted her hips a little, knowing she looked good in the black mini-dress she was wearing, and cocked an eyebrow at him. "Don't you want to spend just a littlemore time here?"
Simon narrowed his eyes. "Not with that tall asshole checking you out every two minutes."
Isabelle looked over her shoulder and noticed the guy in question for the first time — and whoa, he was hot. Dark hair, dark eyes, corded muscles… When he saw her looking, the guy quirked the side of his mouth upward and winked.
"Isabelle!" Simon hissed. "You don't have to check him out too!"
She whirled around and was surprised to see the hurt in Simon's eyes. "Oh, come on," she said, "there's no harm in looking—"
"Yes, there is," Simon insisted, and suddenly he was twisting his hands into her hair and nudging her mouth open with his own. While Isabelle just stared at him in shock, he bit down gently on her lower lip and started pecking kisses along her jaw.
Isabelle leaned back, gasping for air and looking at Simon with wide, dilated pupils. "What," she exhaled, "was that?" He didn't even kiss like that when they were inprivate, let alone in a crowded bar where they could attract spectators at any moment.
"That," Simon whispered, "was a message to everyone in this stupid bar that you're mygirlfriend."
Isabelle laughed and kissed him back. "All right, Simon. I think they got the message."