Hitch to the Tycoon by Mistake

My name is Audrey, the switched-at-birth "fake heiress" of the Bailey family.
When a family financial crisis hit, I was forced to sign a four-year contractual marriage with a mysterious man I’d never met—all to take the place of Sienna, the real Bailey heiress.
Strangely enough, he never once reached out to me in those three years.
Now, in the final year of our contract, I’m being pressured to return home and meet him.
The night before my trip back, I got drunk, wandered into the wrong hotel room, and accidentally slept with the man inside.
The next morning, I fled, leaving the only 100 dollars I had in my wallet as compensation.
Later, though, I made a horrifying discovery: that man was Caspar Thornton—the legendary, all-powerful tycoon who dominates the financial world.
To make matters worse, I accidentally landed a job as his son’s art teacher. Now I’m walking on eggshells every day under his nose, terrified he’ll recognize me.
How do I survive this guy?