She caught them in bed together and was stunned when she realized they were having an affair, and now, Jill (Jess Walton) will confront Phyllis (Gina Tognoni) about her cheating on Jack (Peter Bergmann) with none other that his brother-and Jill's son-Billy (Jason Thompson) on The Young and the Restless.

During their latest rendezvous, Phyllis decided she was done living a double life, and told Billy she had decided she would end things with Jack, and after the divorce, they could go public as a couple. But now, after Jill saw them and snuck into Phyllis's room at the Athletic Club to confront her, her plans could change.

"What were you doing in my son's bed?" She asks a stunned Phyllis in a preview clip for the Wednesday, July 27 episode.

Phyllis will be shocked by the question, and may try to deny the truth, but when Jill tells her she physically saw her and Billy together, Phyllis may need to finally fess up to the truth, and when she does, she could be forced to once again reevaluate her decision.

Meanwhile, Billy, who is finally happy again knowing that soon enough he will get to call Phyllis his, will be shocked when he too finds an unexpected guest at his home-Chloe (Elizabeth Hendrickson).

Chloe, who is back in town after helping Victor (Eric Braden) frame Adam (Justin Hartley) for Constance Bingham's death, will be shocked when she arrives at the Chancellor Mansion and sees none other than Billy open the door. He too will be stunned when he sees her, and they will both question what the other one is doing there.

"What are you doing here?" They ask one another in the clip.

The two may then decide to catch up on things since they were once much closer, and may want to bond over their still mutual sorrows over Delia's death. And if he is feeling particularly confident, Billy may even decide to confide in Chloe about his relationship with Phyllis.

The Young and the Restless airs Monday-Friday at 12:30 p.m. on CBS.

Tags: The Young and the Restless CBS Soap Operas