Remus/Severus Mates?
Ok so we know that Remus is a werewolf. Well, what if werewolves had mates that were also dark creatures? And it's not that hard to believe that Severus is a descendant of a vampire. So Remus and Severus
And they figured out how their relationship would work. Severus would send Remus clothes of his, so Moony would have his mate's scent to keep him from killing the Marauders in a search for his mate, and Remus would send blood of his to Severus (because the descendants of vampires need their mates blood (I'm actually bullshitting this right now please don't come after me for this being canonically incorrect)).
But their hormones go crazy in 6th year. And they end up having to spend full moons together (if you catch my drift). Eventually the Marauders get suspicious of Remus disappearing off the Marauders Map (Severus takes him to the RoR) every full moon because he doesn't need them. If anyone wants to write this, they can decide what happens.
-Alexis