What could she be referring to? Here are a few possibilities.
Toby’s true nature. In the same interview, Tammin was asked if Toby (Keegan Allen) and Jenna knew about each other’s true motives, and Tammin said, “I think so.” This could mean that Jenna has known her step-brother is evil for a long time now. He might have even been one of the first people to warn her about Alison (Sasha Pieterse) and her clique of friends.
The NAT club. Jenna was dating Garrett (Yani Gellman) back when the NAT club was still in action, and she knows about the secret tapes. She might not want to advertise that information, since it seems like “A” is targeting the NAT club right now, but if Jenna isn’t already on the “A” team, she may need to watch her back. Someone seriously wants those tapes to remain a secret.
What happened “that night.” Jenna was driving the car that drove a drugged-up Emily (Shay Mitchell) towards Alison’s empty grave, and she was smiling at someone in the passenger seat. Who was with her? And who else helped her plan that mysterious drive?
Tell us what else you think Jenna could be hiding in the comments below.