‘The Bold And The Beautiful’ spoilers for Sept. 12: Steffy blows her top over Eric’s engagement news; Bill orders Steffy to go back to Wyatt

An explosive day sets the tone of this week's episodes of “The Bold and the Beautiful” (“B&B”). On Monday, Steffy (Jacqueline MacInnes Wood) becomes absolutely livid after learning about her grandfather’s engagement with Quinn (Rena Sofer). Expectedly, the other members of the Forrester clan share Steffy’s sentiment.

Spoilers suggest that Steffy grows desperate after Eric’s (John McCook) latest move, and will resort to drastic measures to stop any marriage from happening. Other “The Bold and the Beautiful” cast members who will appear on the Sept. 12 installment include Rick (Jacob Young), Maya (Karla Mosley), Ridge (Thorsten Kaye), Brooke (Katherine Kelly Lang), Bill (Don Diamont), Thomas (Pierson Fode), Liam (Scott Clifton) and Wyatt (Darin Brooks).

Spoiler Alert! This article contains "The Bold and the Beautiful" spoilers. Read only if you want to know more about it.

TV Guide reports that on Monday’s episode of “B&B,” Quinn is extremely concerned with how Steffy reacted towards a change within the Forrester family. Meanwhile, Rick pulls out all the stops to make one of Maya’s dreams a reality, including seeking the help of an influential friend.

The show’s official YouTube channel posted a preview video for the Sept. 12 episode. It features multiple scenes with Brooke, Ridge, Bill, Steffy, Eric and Quinn.

On the first scene, Bill tells someone, “Because I have a son, actually two sons, I would like your answer to that question.” In another scene, she orders Steffy to pack her bags and to go home to her husband. Steffy, on the other hand, retorts, “You of all people should know that’s not an option for me.”

Meanwhile, Brooke reprimands Ridge. “You can’t keep saying things like this – like your Logan,” she says. Quinn wraps the trailer as she displays her engagement ring and insists, “I love him Steffy, and I’m going to be his wife.”

"The Bold and the Beautiful" recap

In the previous episode, Steffy insisted to her mother-in-law that the only chance her marriage with Wyatt will succeed is if Quinn leaves Eric. However, Quinn said that she can’t leave Eric, making Steffy threaten divorce. Later, Steffy confided in on her brother about the Quinn situation. Thomas reckoned that Steffy is in love with both Liam and Wyatt. She agreed, saying that she could easily spend her life with either one of them. Meanwhile, Brooke and Ridge had an emotional moment as they talk about their plans to get rid of Quinn. Ridge felt guilty for letting Brooke make a sacrifice of marrying Bill. Brooke insisted that she wants to marry Bill. Ridge said that even if she does, she’ll always be his Logan.

Elsewhere, Eric spoke to Stephanie’s portrait and flashed back to their life before. Later Quinn arrived and was surprised when Eric kneeled down on one knee and proposed. Quinn squealed with delight and said yes. When the two kissed, Stephanie’s portrait dropped to the floor, breaking glass.

Click here to watch some episode previews from the official YouTube channel of “B&B.” Find out what happens next on “The Bold and the Beautiful,” which airs in the US from Monday to Friday on CBS. It also airs on Channel Ten in Australia.