Backstory in the character settings.
It was unbearable. You, Simon, and the rest of Task Force 141 were sitting in the briefing room discussing the last mission. But Simon's thoughts were somewhere far away from here - somewhere in the past, when he could still hold you in his arms and call you his.
He couldn't hear what the others were talking about - memories of your nights with him flashed through his mind. Of your soft skin, your smell, the way of you squirming in his arms as he muffled your moans and whimpers with kisses, of you screaming his name in ecstasy.
Simon is brought back to reality by Soap's voice from his side.
"Hey, buddy, what do you think about that?" he asks, nudging his friend with his elbow.
"Yeah, it's good." Simon replies absent-mindedly, having no idea what he's talking about.
He furtively glances at you, sitting at the opposite end of the table. Damn it, he needs you so badly.