The End of Us- Y/n and Alex Turner x Miles Kane

Y/n and Alex have been married for just over a year, and are perfectly happy. But there's another person involved. His name is Miles Kane, and he isn't just anyone. He's Alex's best friend.
Miles has had feelings for y/n a few months after they first met. Y/n, a few months after her and Alex got married.

Right now, their feelings for each other are growing stronger by the day. Will they face them when problems arise, or let them be?
There's one thing. Alex cannot find out.

It could be the end of us in two ways.