Nikolas (Tyler Christopher) and Britt's (Kelly Thiebaud) engagement party is about to be rocked with scandalous news on General Hospital.

A 'Huge Surprise' Unveiled At Engagement Party?

Britt's lies about Baby Ben have slowly been catching up to her, and now, thanks to evidence that Liz (Rebecca Herbst) and Ric (Rick Hearst) found, the full extent of the lies will be exposed.

In a preview clip for the Monday, March 24 episode, Liz will tell Lulu (Emmee Rylan) the truth -- she is Ben's mother, not Britt.

Britt Prepares To Tell Nikolas The Truth ABout Ben?

"What do you have to tell me?" Lulu asked.

"It's about Ben," Liz said.

When Britt first became pregnant with Baby Ben, she lied and said that Patrick (Jason Thompson) was his father. After that was proven to be a lie, she pretended that Brad (Parry Shen) was her son's father. However, she had actually implanted Lulu and Dante's (Dominic Zamprogna) embryos in herself, making her a surrogate for their child, something she never admitted to.

However, Liz previously proved that Dante was Ben's father when she suspected something wasn't right. Now, she will also be the one to break the news about Lulu's being a mom.

Dante meanwhile, may have his own suspicions about Britt being his son's mother, as he has noticed that Ben has fairer features-something neither he nor Britt possess.

"Nikolas, do you mind if I have a word with Britt?" he asked in the preview clip.

If Britt confesses or Lulu confronts her, not only will Britt lose custody of her son, but she could lose her fiancé as well.

General Hospital airs Monday-Friday at 2 p.m. EST on ABC.