Caught In the Act

Hellsing fanfic :3 Riley and her twin Aleksander(Sasha) were destined to be the mates of Alucard and Seres. But after the fight in London they thought they had died. But when they get caught by their mates one night while killing ghouls they see they were wrong. Now they have to fight to be next to their partner. Will they be accepted or be cast aside forever?

Also i dont own Hellsing or anything just the oc's lol some pictures will just be random people or scenes
AluxRi SeresxSasha