Noun
trouble in paradise (usually uncountable, plural troubles in paradise)
(idiomatic) An unexpected problem in a supposedly positive situation, especially in a marital or romantic relationship.
My wife wasn't in the best of moods on our honeymoon last week. ― Trouble in paradise?
Kofi hit the Boom Drop then set up for Trouble in Paradise. Source: Internet
Trouble in Paradise – Kim Kardashian and Kanye West Keep on Fighting? Source: Internet