DNA test

Yes, she knew who Jean is…

...…

Grandma Valdez was uspicious about Jean from the start. But she is equally not willing to accept that her first child Sophia didn't die in car accident twenty five years back. 

She simply didn't have any more energy to face any more surprises….

However, the more she saw Jean the more she resembled to her daughter Sophia as well as Maria. Not physically but more in the way she carry herself. 

Her habits, her independent nature, tastes and many more.

But her suspicions got stronger when Jeff started to talk about Jean. Later, she saw drastic changes in him whenever he look at her...as his grandmother she knew that he love Jean…..not in that way but as a sister. 

This started eating her alive as many questions started clouding her mind. Her curiosity and restlessness made her to take a bold step.