The Nanny's Billionaire

Lana, a former prostitute, had a one night stand with Ethan Wright the country richest man. He offered her a job to be his daughter nanny.
As Lena worked for Ethan, she fell in love with him which lead to a secret relationship 
However, Amelia, Ethan's late wife sister intend to kill Lena and win Ethan heart for herself.
Will Amelia succeed?