It Should Only Be Me - vanijeanne fic NSFW

Jeanne is pregnant. At a diplomatic event between vampires and humans - the Burliere Ball - Vanitas watches Jeanne and Domi arrive. Jeanne looks stunning wearing a dress the same colour of blue as Vanitas eyes. Before Vanitas can take a step forward, the handsome and rich Count of Greshan asks for Jeanne's hand to dance.

Now:

In a private study room away from the ball, Vanitas and Jeanne argue but it quickly escalates into... something more.

In essence, Vanitas shows Jeanne who she belongs to, up against a door.

These two idiots still not knowing they're in love.