Sweet Wild Bride of Mine

Eliza Spencer built her fortune herself. Someone tries to kill her, she survives it, and she wakes up with no memory of who she is. The man who pulls her out is Justin Patton, a stranger in a wheelchair, and she marries him without knowing anything about his past. He is a billionaire too, and the wheelchair is a performance he keeps up for reasons of his own. Eliza's memory comes back. She says nothing. Her family has taken hold of her company in her absence and is treating her as dead, and Justin's half-brother and stepmother have designs on him that would not survive him standing up in public. So she stays married under the name she woke up with, works from inside it to take the company back off her relatives, and keeps herself between Justin and the two people in his family who want him gone.