The tension in Genoa City is officially boiling over.

The Young and the Restless (Y&R) update for Monday, June 1, indicates that Victor Newman (Eric Braeden) will deliver a shocking ultimatum to Nikki Newman (Melody Thomas Scott).

Meanwhile Jack Abbott (Peter Bergman) admits he’s made a bold move in hopes of tracking Diane Jenkins Abbott (Susan Walters) down.

At Society, Jack will walk in on Sally Spectra (Courtney Hope) and Billy Abbott’s (Jason Thompson) happy wedding talk.

It’ll leave Billy and Sally worried that they’re rubbing Jack’s nose in their bliss, but he’ll insist their happiness gives him hope for his own future.

Of course, Jack will remain worried about Diane going MIA, so he’ll speak to Billy about that after Sally leaves.

Billy will find out Jack suspects Patty Williams (Stacy Haiduk) might be to blame for Diane’s absence.

That’ll lead to Billy admitting fears of his own based on a comment Patty made about dealing with Diane.

Jack will wonder why he’s just now hearing this news, but Billy will insist he told Diane and that she downplayed it as Patty’s usual ramblings.

Jack will confess that he hired a private investigator to find Diane before he lets Billy distract him with a wedding-related request.

When Billy asks Jack to be his best man, Jack will quickly get on board and offer a hug.

At the Newman ranch, Victoria Newman (Amelia Heinle) will give Nikki and Victor a nudge to work things out, especially considering everything that’s been going on with Nick Newman (Joshua Morrow).

After Victoria exits, Nikki will express her willingness to put the past behind them, so Victor will seem to want that, too.

However, the plan will fall through when Victor demands that Nikki end her friendship with Jack.

Once Nikki’s pressured to choose between Jack and Victor, she’ll get outraged all over again.

After Nikki gets another headache, she’ll pop a pill and seem a bit woozy.

At the park café, Sally will start panicking a bit now that her life is so perfect.

It’ll make Sally worry about everything falling apart, but Audra Charles (Zuleyka Silver) will give her a pep talk and calm her down.

Other Y&R spoilers say Noah Newman (Lucas Adams) will have an idea on how to get Matt Clark’s (Roger Howarth) memories to resurface.

That’ll lead to Noah showing Nick, Sharon Newman (Sharon Case) and Sienna Bacall (Tamara Braun) the finished product of the new version of The Shadow Room in Genoa City.

Since it’ll be a copy of the original, Nick will drag Matt over there and let him look around.

It won’t feel familiar initially, but then Matt will face some memory flashes.

Matt will recall Nick decking him by the bar and Sharon speaking to him outside The Shadow Room in Los Angeles.

Matt will also remember tense conversations with Sienna, Noah and Victor at his former nightclub.

As Matt gets a strange look on his face, Noah will guess that things are starting to come back to him.

The Young and the Restless spoilers say Matt will keep getting puzzle pieces from his old life, so stick with the CBS soap.