Kink meme fill: Established relationship. After someone flirts with Stiles, Derek needs to show him who he belongs to by fucking him in a room full of mirrors so he can see himself stretched open. Bonus points if Derek forces Stiles to watch as his hole is stretched to accommodate Derek's knot
(p.s. I win the bonus points)
Omegas are coveted members of society. Alphas and Betas alike have no restraint when it comes to an Omega and their alluring scent. In this society it is perfectly normally for an Omega to be taken at any time, as long as they are willing of course, but Omegas are cock hungry creatures and could never refuse a good dicking.
Stiles and Derek act like a couple. But they're not. Seriously! Derek has a boyfriend and Stiles has a girlfriend. They're just friends, overly-attached and possessive friends, but that's it. Right?
Derek needs a mate but he doesn't want to bite Stiles. Cue some drama, angst, and emotional moments. It all seems normal, right? But this is Beacon Hills, mate. NOTHING is ever "normal".
Stiles is used to Derek being all growly, claiming and rough when he gets jealous, but when something that usually would make Derek all the above happens, and Derek shows no interest in Stiles whatsoever, Stiles starts to worry.