This is just a oneshot, no other parts before or after this.

This is my first story here (plz don't judge, lol).
Mettaton and Kuyar had been married for some time, and they had been living in a nice rental house on the surface together, and Napstablook was living with them, as well.
Kuyar wakes up in the middle of the night one night and they get an unexpected visitor...