You were Nico's sibling.

You were sitting casually on your bed in the Hades cabin, reading, when the front door opened. Nico was there, as was Will. Nico seemed to say something to him, as Will nodded. Nico then took a deep breath and walked closer to the bed, where you had already set the book aside and looking at him curiously. Nico breathed in another deep breath, before saying quickly and loudly. "I'm gay. I'm dating Will. Please, don't hate me"