When Worlds Collide by Erin Zak

This is an age gap romance set on Broadway – with all the main characters being involved in the industry in some way.
We have the leading lady in a musical, her gay cast friends, and her ex husband who wants to reconnect. He just so happens to be the agent of an author whose book is being made into a film.
These people swirl about together and there is anger, angst, annoyance, attraction, longing and joy.
And it all turns out well in the end.