Kat will (Kill) on vacation in Maine until Sunday, and will have no internet until then.
Kat will (Plot) on vacation in Maine until Sunday, and will have no internet until then.
Kat will (Be) on vacation in Maine until Sunday, and will have no internet until then.
Kat will (Never Be) on vacation in Maine until Sunday, and will have no internet until then.
Kat will (Cackle Maniacally while) on vacation in Maine until Sunday, and will have no internet until then.
Those are my top five guesses.