Chasing Fate: An Enemies-to-lovers Romance by Kat T. Masen

Triangular relationship 

• consist of two friends, one of which has introduced a romantic partner into their life, causing a feeling of alienation for the “abandoned” friend.

I screwed up my perfect bachelor life in one single night. 
After that, I end up crashing at my cousin Charlie and her husband Lex's house with their family, which means kids. 

It gets worse…
Charlie doesn’t care for my single life. 
She has it in her head I am a heartless playboy―Noah Mason will never commit to a woman.

My only saving grace is Kate, Lex's assistant.
Kate is everything I need in my life right now―she’s sexy, intelligent, and willing to have unadulterated fun.
And we’re having the time of our lives.
That is until Kate dares me to commit to only one woman.
My so-called victim―a Hollywood movie star.
But I have to get past a roadblock first―her personal assistant.

Commitment is one thing, falling in love is another.
And I refuse to lose the bet.
There’s only one small problem….
Am I chasing the wrong woman?

Chasing Fate is the fifth book in the Dark Love Series and must be read after Chasing Him. This book contains friends-and-enemies to lovers themes.