Percy always thought it was super hot when Nico spoke Italian.
One day in Nico's cabin when they were making out (they planned on go to get lunch, they swear) Percy let it slip.
Nico grinned. "Really?"
He started kissing up and down Percy's neck, whispering "sposami. Por si prega di Percy. Sposami."
"um guys?" They jumped away from each other and saw Annabeth in the door way.
"did you just ask him to marry you?"
"um...maybe..wait you speak Italian."
Annabeth nods.
Percy stares at Nico.
"Well Percy, will you Marry me?"
Nico pulls out a ring. Percy gives Nico a big smiles and hugs him. "Yes"