Poly!Vampire!marauders x human!reader
Vampire!Sirus lying to Vampire!Remus and Vampire!James by telling them that he's just going on a walk to get some things but in reality he's actually going to watch their little human from a distance whether that be at their uni or when they're just out and about just to make sure they don't get hurt or if someone is bothering them Vampire!sirus can just sworm in and defended them which would also lead to him finally making an introduction to his bunny.
Soon enough Vampire!remus and Vampire!James would catch on as Vampire!sirus isn't actually bringing home anything and is starting to smell different so when they go to confront him about it remus is obviously mad about sirus not staying true to the agreement they had established when they realised who their 4th lover was especially since their lover is human.
Later on whilst Vampire!remus is giving Vampire!sirus a long lecture about how they agreed to introduce themselves to their human lover all together Vampire!James has snuck out to go make his own introduction to their little human which his excuse is if sirus can do it why can't he?
Might make a drabble with Vampire!sirus and Vampire!James with werewolf!remus x reader