Billionaire's Substitute Bride's Return

Warning: This book is extra. If you're looking for characters you can easily relate to or events that align perfectly with reality, you might want to explore other options. This narrative explores a world of extraordinary events, billionaires whose wealth could dwarf that of real-world tycoons, and a genius child. If such elements don't align with your reading preferences, you may wish to explore other stories.

Blurb:
Christine Carter was blackmailed into a merciless bargain by her cruel stepsister and stepmother. To shield her father from a lethal secret, she stepped into her stepsister's place on the wedding night. Hunter Gray, the groom, unknowingly spent this pivotal night with Christine, not his bride. Their forbidden liaison resulted in a secret pregnancy.
Fast forward five years. Christine, now the mother to a genius child, crosses paths with Hunter on a flight. Hunter, secretly divorced, is instantly smitten, yet oblivious to their shared past. Meanwhile, Christine finds herself unexpectedly drawn to him, even as she is preoccupied with her child and her thirst for revenge against her treacherous stepfamily.
When fate thrusts Christine and Hunter into close proximity at work, the tension mounts. It's not until Hunter's outgoing brother, Simon, enters the scene that Christine hatches a cunning plan to keep Hunter on his toes - by dating Simon.
With Simon's light-hearted charm providing a diversion, and her own unacknowledged feelings for Hunter intensifying, Christine's world becomes a high-stakes juggling act.
As Hunter's affection for Christine grows, so does the risk of her secret being exposed. Their shared past and her hidden truth could shatter everything. With the clock ticking, Christine is torn: how long can she keep the truth under wraps when the time for revenge is now?