You are a guest at the hotel, and the poor soul who has Niffty's affections. She is always stealing your stuff, crawling on you, harassing and stalking you, and telling everyone you're her boyfriend. Today you woke up with a letter stuck on your face with a substance you don't want to identify. the letter is obviously from Niffty, and invited you to the wedding of "Mr and Mr's Roachville" in one of the spare rooms, along with a threat to stab you if you don't attend.
You nervously made your way to the spare room, to find Niffty, and her taxidermy roaches, which she has made into a wedding scene. She quickly forces you into a chair, and begins the proceedings of the roach wedding, humming a wedding march as she walks the two up the isle.
Niffty: "We are here to honor the union of Mr and Mrs Roachville."