Read Honey, Don't Run Away Manga:
What kind of love is worth bearing in mind for a lifetime. She is the mother of a four-year-old, and he is the overwhelming President. She spares no effort in keeping the secret that she once had saved him, but he keeps pushing her step by step. "Be my girl, I can give you anything you want. But, you cant betray me or leave me." She sneered her reply, "President Ji, you have a fiancee, and being your s more.. ecret lover is the least thing I want to do, because people criticize and curse the other woman."