Brother’s Rival, My Secret Lover

Gwen Jewell transfers into a school in the city, sweet-natured and with no experience of any of this. Her brother Jim gives her one warning before she goes: stay away from bad men, especially the rich handsome kind. She holds onto it, and she knows exactly who it applies to, her brother's sworn enemy. She is also working part-time to pay for her father's prosthetic surgery, which is how she ends up at a banquet humiliating a CEO in front of everyone and starting a feud she did not want. They run into each other again at a bar and end up spending the night together. She takes a job as his secretary. He keeps pursuing her, she keeps sending him mixed signals she does not fully understand herself, and he cannot get over the fact that his charm did not work on her at first. It stays secret. Her brother starts noticing she has changed. Then she turns out to be pregnant, and he proposes.