His Unknown Heiress

Jules Jenna hates the fact that she's trying to hide herself in her work to avoid grieving her parents' death. She needs someone in her life and she's never been good with relationships. But one thing she is good at is taking care of kids. She decides to adopt a child, whom she falls in love with.
 Ceaser Thompson just found out that his deceased wife had his child and gave her up for adoption. Now he wants his child - the heiress to his companies - and he'll go any lengths to have her as his own, legally.
Will this woman who adopted his daughter give her up easily or Would he have to use his charms to get her to give in...and give up?