My Cruel Billionaire

I got pregnant, dumped and fired...
...by my ruthless billionaire boss.
I thought I could delete him from my life and move on.
And yet I still see him every time I look at my son.
Our son.
Five years later Michael Wallace returns into my life and turns everything upside down.
He is still ten years older than me, infinitely richer than me and insanely hot.
I need to work with him if I want to escape the rat race and spend time with my family.
But he is as grumpy as he was before and it drives me insane!
And now someone is trying to sabotage both the company and our relationship.
I have to finish the project, I need to tell him about his son and I want to feel his embrace, but...
...I can only pick one.
No cheating, no cliffhangers. HEA guaranteed! Can be read as a standalone.