The billionaire needs a nanny for his child

What happens when a billionaire marries a lady because his dad pressurizes him to give him a grand child that is not out of wedlock for his inheritance?


What happens when the billionaire divorces his wife after the contract of giving birth to a baby for him is over? 


What happens when his ex wife shows up disguised as a nanny for his child? 


What happens when the ex wife is only back to have her revenge for the pain she endured because of the contract she signed with him? 


What happens, if the billionaire slowly starts falling in love and getting romantically acquainted with his ex wife disguised as a nanny? 


Considering the fact that when they were married before, he would cheat on her with different types of women because of how rich he is. Considering the fact that, he would beat her up when she tried to interfere. Considering the fact that he abused her and made her life a living hell. And at the end of the contract, he divorced her, paid her the complete money for the contract, and still threw her into a solidarity confinement. And let her go, when her memory begins to suffer and fail. 


Will she because of the bond she grows with her son, give the billionaire a second chance, still disguised as his son's nanny? 


Or will she give him a second chance as his ex wife? 


Will he be able to forgive himself, if he ever finds out that she is his ex wife? Will he want her back in his life? Or will he go on to marry his fiancee at the moment?