My Best Friend's Forbidden Brother

Never have I ever kissed my best friend's brother... FALSE!

He is a high-profile CEO.
He is my best friend's big brother.
He is absolutely "pinky swear type" forbidden.
And he totally hates me.
BUT he is the only one I can turn to for help.
Add a little blackmail to get that help and voila.
Now, I guess he hates me twice as much.

He thinks I'm a frilly dumb blonde wrapped in pink.
And on the right track to destroy my multi-billion empire.
Well, time to prove him all wrong.
And show him who can also be a boss.

The only problem?
Documents are spilling.
Sparks are flying.
And a kiss is the result.

I know.
I just crossed a line I should never have.
And he still hates me.
Annnnd, I might also end up losing my best friend.
But for some odd reason, I just cannot stop kissing him.
How long can I keep this a secret before everything blows up on me?