My Mother Faked My Daughter's DNA Test

My mother came to my baby's first birthday party with murder in her purse.
Not a literal weapon—something far more vicious. A fake DNA test claiming my daughter wasn't my husband's child. She planned to destroy my family in front of everyone: friends, neighbors, people recording everything for social media.
She got her wish.
Caspian shattered. Jumped off the balcony right there at the country club while cameras rolled. I followed him down, dying in a pool of blood and my mother's satisfied laughter.
But death gave me a gift: seven days to rewind.
This time, I came prepared. Real DNA tests. Dirty family secrets. And a biological father nobody knew existed.
She wanted to play games with paternity results?
FINE!
Wait until she discovers whose bastard child has been living in her house all along.