My Husband's Phantom Mistress

I had the perfect life—a brilliant doctor husband, Grayson, and a beautiful daughter, Emma.
Then Emma died.
At Grayson's birthday dinner, I saw it in their eyes—the doctor's wife, just a waiter's daughter… the grieving woman who lost her child.
That's when I noticed her—Sophia Turner. Elegant, elite, perfect.
The way she looked at my husband. The way he smiled back.
No one else admits she exists.
Grayson says I need therapy. The doctors all agree.
They think I'm going crazy.
But what if… I'm the only one who sees the truth?