A/N : Warnings for anger sex, oral sex, infidelity, language, symptoms of depression, and mention of Klaine (Blaine). Bittersweet with angst and a lot of insulting.

Sebastian's cock brushes Kurt's prostate and his eyes roll, eyelids fluttering shut, his body still and waiting, praying it will happen again.

"You know, it wouldn't kill you to moan or something," Sebastian grunts. "So I know you're still awake. And are you going to actually move, or are you going to stay there like a statue?"

"You said you wanted to fuck me, asshole," Kurt growls. "So fuck me."

Sebastian digs his nails into Kurt's hips and pounds harder, making a point to get his frustration across. Kurt rears back and meets him stroke for stroke to show Sebastian what he thinks of his petty attempts at being rough, but that turns Sebastian on more.

"That's what I'm talking about, princess," he moans.

"I…I didn't know you needed my help, Smythe," Kurt pants, continuing to fuck himself on Sebastian's cock. "How the fuck are you so popular?"

"It's not my fault that you're a frigid bitch," Sebastian argues, reaching around Kurt's body and grabbing his cock, jerking him off dry and tugging uncomfortably hard. Kurt doesn't care. He wants it to hurt. He needs the pain. It's the only thing that erases everything else. Kurt knows that as soon as the pounding in his ass stops, he'll have to contend with the agony in his heart; dealing soberly with the blistering disappointment his life in New York has become.

Always passed over in favor of Blaine.

Sidelined because of Rachel's so-called talent.

Shelved before his prime, expected to be content with mediocrity.

Sebastian is the only thing in his life that exceeds his expectations, even if afterwards he can't look at himself for days.

"Oh, Kurt," Sebastian moans. "God, Kurt. How are you so incredibly tight? Oh, Kurt…"

This is the part of having sex with Sebastian that Kurt can't stand, when Sebastian gets caught up in some fantasy of his own. It's the sound of his voice, the way he says Kurt's name that confuses him. In some ways it infuriates him. In other ways it tugs at his heart from all sides, pulling it apart completely. There's something close to love in the way he says Kurt's name, and it burns Kurt with curiosity.

Kurt doesn't know what the fantasy is. Sebastian won't tell.

Kurt and Sebastian work so well because they're both equally broken. Sebastian knows what broke Kurt.

Whatever broke Sebastian, Kurt is sure he'll never know.

Sebastian's hips stutter, and Kurt slams back against him, not even close to done yet.

"Oh, Kurt," Sebastian continues to mutter.

"Not yet," Kurt says in a panic. "Don't you fucking cum yet."

"Y-your fault f-for outlawing condoms," Sebastian babbles around a long sustained moan.

Kurt knew it was stupid and risky. Sebastian has definitely been ridden more than the 'A' train. He made no attempt to hide that fact. But it felt too good having sex without them, and Kurt wanted to take more risks, even if it was with his health.

Sebastian pulls out, leaving a trail of cum behind, and flips Kurt over, taking his still hard cock in his mouth and sucking hard. Kurt has to hand it to Sebastian; he always knows what to do to get Kurt off. It doesn't take much; not with Sebastian's talented tongue wrapping around his dick and massaging his shaft.

"Oh, God," Kurt groans, grabbing the back of Sebastian's head and pulling him down over his cock, burying himself down his throat. He can hear Sebastian gag, but Sebastian doesn't struggle, just waits patiently until Kurt is done, until the death grip in his hair loosens and he can get up and breathe.

"Fuck, Kurt," Sebastian sighs, sucking in a deep breath, filling his lungs to bursting, "if I didn't think you'd eventually kill me, I'd say we should do that every day.

Sebastian looks blissfully happy and relaxed, and tonight, like most nights, Kurt wishes he could join him in his delirium, but Kurt's already retreating.

"Great," Kurt says through clenched teeth. "You got what you wanted. Now get the fuck out."

Sebastian's head snaps around to look at Kurt, his smile disappearing, his eyes dark and menacing.

"I got what I wanted?" Sebastian hisses. "You practically dragged me back here!"

"Yeah, well now I'm kicking your ass out." Kurt wraps the comforter on the bed around him, shying away from the wet spot growing below his ass.

Sebastian huffs in frustration, standing up and pulling on his clothes.

"You know," he mutters to himself loud enough for Kurt to clearly hear every word as he dresses, "after all this time how can I even be fucking surprised? I fall for your bullshit every single time."

"Well, that makes you stupid and a lousy fuck," Kurt chokes out, pushing himself as far up the bed as he can to put as much distance as possible between himself and Sebastian, because if he doesn't, if he gets any closer, he might throw himself into Sebastian's arms and start crying.

If he starts crying with Sebastian's arms wrapped around him, he knows he'll never stop.

Sebastian looks at Kurt, cocooned in his blanket and shuddering against the pillows, but he can't feel any sympathy for him, especially with his pride still stinging.

"Give my regards to Blaine, princess," Sebastian says with a smirk. He turns toward the dresser where Kurt keeps his engagement ring when they fuck, picks up the gold band, and tosses it at him. It lands on the comforter right beside Kurt's knee, and Kurt flinches, inching farther away. Sebastian walks away from Kurt and shows himself to the door, ignoring the faint, muffled sobs that follow him out.

Sebastian bites his lip until he's sure it will bleed.

He knows he should stop.

He knows that the next time he sees Kurt coming, he should run the other way…but he won't.

He can't.

Sebastian knows he'll give in to Kurt. He'll give in to Kurt every single time.

He'll follow Kurt here to the loft, and he'll let Kurt break him just a little bit more.