She couldn't believe it; Isabel Smith's parents were actually killed by her own parents.
Actually, she didn't care who took over Smith Corporation; however, she wanted to see Isabel Smith's downfall. Unexpectedly, Isabel didn't die in that car accident; instead, she survived and, having lost her parents, she gained even more love and attention from Mrs. Smith, who had the most authority in the Smith Family.
She wanted Isabel to lose favor... So, she secretly bribed a doctor with money. To be foolproof, the doctor took Isabel's egg when examining her and then combined it with Percy Stanton's sperm she had stolen. After half a month, on a night when she was guarding the hospital and taking care of Isabel, the doctor placed the successfully fertilized egg into Isabel, who she had drugged with sleeping pills in her food.