'The Young and the Restless' spoilers for Sept. 12 – 16: Billy calls Jill’s bluff; Ashley is caught in the middle; Phyllis does a juicy tell-all

A set of unexpected events and stunning truths awaits fans of “The Young and The Restless” (“Y&R”) this week. On Monday, Jill (Jess Walton) seems to be suffering from a heart attack and lets Billy (Jason Thompson) know about it. However, he doesn’t seem to buy her story and instead accuses her of faking her health condition.

Meanwhile, Sharon (Sharon Case) is terrified that an enemy is seeking retribution against her, while Summer (Hunter King) offers the olive branch to someone. Other “The Young and the Restless” cast members who will appear on the Sept. 12 to 16 episodes include Abby (Melissa Ordway), Stitch (Sean Carrigan), Dylan (Steve Burton), Chloe (Elizabeth Hendrickson), Phyllis (Gina Tognoni), Colin (Tristan Rogers), Chelsea (Melissa Claire Egan), Kevin (Greg Rikaart), Ashley (Eileen Davidson), Jack (Peter Bergman), Victor (Eric Braeden), Paul (Doug Davidson), Nikki (Melody Thomas Scott), Victoria (Amelia Heinle) and Neil (Kristoff St John).

Spoiler alert! This update contains more "The Young and the Restless" spoilers. Read on at your own risk if you have not watched the latest episode.

CBS released a preview video for the Sept. 12 episode of “The Young and the Restless.” In the trailer, Abby realises something about Stitch. “I don’t think you see the same relationship,” she says. “In fact I know you don’t.” Meanwhile, Dylan tells Sharon, “If you’re afraid of something just tell me, we can handle it. You’ve got to talk to me.” Elsewhere, Jill clutches her chest as she seems pained. Billy, however, calls her bluff. “Nice try,” he quips. “Maybe next time.”

TV Guide reports that Tuesday’s installment focuses on Chloe as she unleashes her true self. Phyllis, on the other hand, is determined to save her marriage, while Colin devises a strategy to discover what Jill is hiding.

Wednesday’s run centres on Chelsea, as she gets surprised with a gift. Meanwhile, Kevin is bent on finding the details about Chloe’s time away from Genoa City. Elsewhere, Ashley finds herself in the middle of a heated clash between Jack and Billy.

On Thursday, “Y&R” airs an episode that features Jack demanding the truth from Phyllis. Victor, on the other hand, wants to clear his name. Paul seeks Nikki’s help about his problem with Dylan.

Wrapping the week on Sept. 16, Phyllis reveals everything, while Victoria reels from an unpleasant surprise at Brash & Sassy. Elsewhere, Neil pulls out all the stops to help a friend.

Click here to watch some episode previews from the official YouTube channel of “Y&R.” Click here to check out some sneak peek photos of what will happen this week in the CBS soap opera. Find out what happens next on “The Young and the Restless,” which airs weekdays in the US on CBS. In Australia, “Y&R” is shown Mondays to Fridays at 12 p.m. on Foxtel’s Arena.