Phone sex aw yis! Takes place sometime after season 3.
(Also kinda short, I know. Someone should give me a dirty prompt so I can write some longer smut)
Winning
"I bet I can make you come first," whispers Kurt huskily into the phone, his hand wrapped around his own cock, pulling gently.
"First one to come buys the other dinner tomorrow?"
Kurt smirks. "You're on, pretty boy."
Blaine grunts. "Don't call me that," he murmurs hotly.
"Mm, why, because it gets you all hot and bothered?"
"Fuck," says Blaine, and Kurt can hear sheets rustle.
"I plan to."
"Yeah, is that what you want? Want to fuck my tight ass open?" he adds another moan in the end, and Kurt clutches the phone tighter.
"Mm, not before I get to lick you and suck you off. Want you all loose and calm in my arms, so pretty and begging and mine."
"Ah, I'm yours. Always yours, Kurt. Oh, yes, fuck me harder!"
"Are you fingering yourself, baby? Want my fingers stretching you and my tongue licking your hole? My dick pounding into you?"
"Oh, yes, Kurt, ah! Take me, take me and fuck me, Kurt!"
"Yes, baby, gonna fuck you so hard, make you feel it so good, baby, I'll fuck you- oh, oh, Blaine, yes!"
"I can hear how close you are. Are you gonna come? Come and imagine it's my tight ass around your cock?"
"You come first," grunts Kurt, panting. He forces himself to let go of his own dick, gripping at the sheets. "Pretty boy."
Blaine moans, loud and long, and Kurt knows he knows what it does to him.
"Thinking about my cock in your ass, aren't you, baby? Driving you crazy, fucking you so slow and not letting you come until you can't take it anymore," he gasps.
"Yes," Blaine whines. "Yes!"
Kurt squeezes his cock, breathing heavily. "Come, baby, come for me. Let g-" his sentence cuts off with a groan, and he can't stop himself; he comes into his hand, pumping his dick in his fist as quickly as possible and crying out.
On the other side of the line are only loud breaths and slow moans when he comes down.
"B, fuck, did you come?" he pants.
"K-Kurt, oh god. Came so hard. Did you?"
His voice is rough and spent and Kurt wants him even more now that the urge to come is not burning in the pit of his stomach. He wants Blaine to be by his side, wants to cuddle close to him and kiss him lengthily.
"Yeah."
"No one won, I guess," he chuckles, breathless.
Kurt laughs. "I think we both kinda won."
It's quiet for a moment, and Kurt closes his eyes, letting himself indulge in the warm feeling and imagine Blaine doing the same.
There's a soft noise, and it takes Kurt a moment to realize those are Blaine's snores. He giggles tiredly, and whispers into the phone, "goodnight, dummy. I love you."