Work Text:
The cold night air nipped at the bare skin that Sebastian's dress didn't cover. Not that he minded though, too out of his head to care about such meaningless things, all that Seb cared about right now was getting home in one piece.
As Sebastian made his way into the Underground and onto the platform he could only sigh as he saw how crammed the train carriages were. But if he didn't get on, he would have to walk quite a distance in some rather painful heels and so he decided that this was as good as it would get.
Sebastian got on a carriage and tried to pull the obscenely short hem of his dress down but it wouldn't budge any further. Oh well, it's not like anyone would be looking at his ass anyways.
A nudge against his back pulled Seb out of his thoughts, he thought nothing of it as the train was absolutely bursting at the seams with passengers. He wasn't the only one made to stand so it wasn't like the person behind him was doing it on purpose.
Or that's what he thought until a hard object ground into the soft flesh of his ass. Sebastian blushed at the stimulation it brought but he still didn't say anything until a hand came down to the hem of his tiny, little dress and palmed his soft folds through his underwear.
"What are you do-", he was cut off when the deep growl of an alpha sounded from behind him.
"Shush little omega, I know you want it so I suggest you turn around and take what I give you without protest if you know what's best for you.", the use of Alpha Voice quieted down any advance to cry out for help and Sebastian knew he would not be able to stop this tall Alpha from having his way with him.
The alpha's free hand pushed Sebastian into the window of the train so that his ass was pushed out to make him present. The hand then wandered down to his cute, pink tits and gave them a firm squeeze before pulling the top of his dress down to let them bounce out. A few passengers had taken notice of what was going on but nobody offered little Seb any help, instead they started filming him.
The tall alpha groped his pussy through the thin cotton until it leaked slick onto the carriage floor and only then pulled the offending item down Sebastian's slender legs. The omega couldn't do anything when he heard the unmistakable sound of a zipper being undone, he could do nothing but cry softly when he felt the wet, spongy head of the alpha's dick rub cruelly through his wet folds and he couldn't find the energy to push the tall alpha off of him when that thick cock breached him and split him open, inch by inch.
Sebastian's wet, rosy cheeks wobbled against the train's windows as he cried out at the unwelcome intrusion. His soft lips opened in an o-shape as the alpha behind him pushed further inside until the small omega was sat with his ass flush with the alpha's hips, now all 8 inches of hard alpha length were buried in that tight cunt.
"Fuck you feel so good around me little omega, I'm surprised that no other alpha has already had his way with you tonight. You're tight like a virgin but wet like a whore." the alpha groaned into Sebastian's neck.
Seb wanted to complain, to stand his ground and show the alpha that he wasn't some free-use slut but all he could do was moan and drool all over the floor. He couldn't even think straight over the overwhelming thought of this stranger knotting him and filling him up.
"Oh, I haven't even knotted you yet and you're drooling everywhere like some knotdrunk bitch. Just wait sweetheart and I'll give you what you want infront of your little audience.", the alpha's mean words made Sebastian's abdomen tighten up in pleasure and before he knew it he was cumming with a high-pitched moan.
Sebastian whimpered as the alpha continued to fuck up into him like an animal, the taller eventually wrapped his arms around Seb's middle and upper thigh to pull him closer. The omega bawling at the feeling of the alpha's knot forming, he wanted it so bad but this alpha would genuinely tear him apart with a thing that big!
"Don't cry, I know you love it omega. I know you love being full of virile alpha cum, you just want to feel owned don't you? That's your only purpose as an omega, to be owned by a big, strong alpha.", the alpha sneered.
Soon enough the alpha's knot popped in Sebastian's puffy pussy, keeping them locked together as the taller emptied himself in the small omega. Seb was too gone to even think about not being on the pill, he just lazily smiled at the feeling of being full of fertile alpha seed. But this relaxed haze was quickly shattered by the distressing feeling of his neck being bitten, a mating mark being created.
The alpha pulled out his softening knot with a frankly pornographic pop and was zipping up his jeans when an announcement rang out across the train, "This is Pimlico. Exit here for Tate Britain. This is a Victoria Line train to Walthamstow Central. Please stand clear of the opening doors."
The alpha pulled out his phone to take a last picture of the mess inbetween Seb's thighs and promptly left. All Sebastian saw of him was a broad back, dark hair and then he was gone and the were doors closed.
Seb was left there, pressed against the window of the train with cum dripping out of his pussy and onto the insides of his pale thighs. Hand shaped bruises formed in dark blue and purple marks on his waist and upper thighs. The mating mark slotted in the junction of his neck bled in little crimson rivulets which ran down to stain the top of his dress.
Sebastian looked like a right slut but all he could do was pull his panties up and get ready to get off at Stockwell Station in order to cross over to the Northern Line so that he could finally be on his way home to his apartment for a well-deserved rest.