'Devious Maids' season 4 episode 8 spoilers: Will there be new mystery to solve? Who is Tucker's father?

A huge discovery in episode 7 of "Devious Maids" season 4 could lead to a new mystery, which this merry band of friends will solve in the upcoming episode 8 titled "I Saw the Shine."

The last episode titled "Blood, Sweat, and Smears" saw Rosie (Daniela Ramirez) being chased off the road by Ben (Carlos Ponce) because her investigation of Peri's (Mariana Klaveno) murder is bringing her closer to the truth, truth that would implicate Ben big time. Unbeknownst to Ben, Tucker Westmore (Carter Birchwell) was in the car with Rosie, who suffered in the accident.

Frances (Stephanie Faracy), the leader of The Circle, learned of this, so she decided to take matters into her own hands by offing Ben. However, the resulting accident demanded that Tucker undergo surgery, where it was discovered that Spence's (Grant Show) blood doesn't match with his. This revealed that Tucker isn't Spence's biological son, which raised the question who is Tucker's birth father?

Frances has already declared in a previous episode that Tucker is the "key to everything." Hence, knowing Tucker's lineage is the key to finding out why he is crucial to The Circle and it could reveal who really killed his mother.

"Carmen's caught in the middle of the Powell household; Genevieve meddles with Marisol's love life; and Rosie comes closer to discovering Peri's murderer after Shannon makes a confession. Meanwhile, Zoila and Kyle receive unpleasant surprises," read the synopsis that Carter Matt shared on their page.

It looks like Carmen (Roselyn Sanchez) will literally find herself caught in between Evelyn (Rebecca Wisocky) and Adrian (Tom Irwin) as the two continue to battle for a divorce settlement. Moreover, she would have to deal with Daniela's (Sol Rodriguez) return, who might be coming back to demand information about Carmen's baby daddy.

What surprises await Zoila (Judy Reyes) and Kyle (Ryan McPartlin)? Find out when "Devious Maids" season 4 airs on Monday at 9 p.m. EDT on Lifetime.