Chasing Fate

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's house with her 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, Charlie's best friend.
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?