He finally came clean to her about ordering the fire at Spectra Fashions, and now, Bill will find himself fighting to save his marriage to Brooke on the Monday, Sept. 18 episode of “The Bold and the Beautiful.”

After telling Brooke (Katherine Kelly Lang) that he was taking a leave of absence from work for a while and had handed control of Spencer over to Liam (Scott Clifton), Bill’s (Don Diamont) wife became more and more suspicious that there was something he wasn’t telling her about the situation. Finally, after meeting with Steffy (Jacqueline MacInnes Wood) and realizing just how far he went when it came to both getting his building and getting revenge on Liam for blackmailing him by punching him, Bill came clean to Brooke about everything.

Brooke was stunned and shocked when she realized that not only did Bill commit a horrific crime by ordering for the Spectra building to be burnt to the ground, but that he also was turning into someone she didn’t know by causing his son bodily harm. She has since threatened to leave and walk out on him because she’s truly disgusted by his actions. However, Bill will do everything in his power to try and convince her to stay, reminding her that he already is at risk of losing Liam’s support for good, and he can’t bear to lose her as well.

“I regret that it might cost me my son, but not you,” he says in a preview clip.

However, Brooke may not be willing to hear him out, and though she knows it will cause him great pain, she could still decide to leave.

"The Bold and the Beautiful"
Bill (Don Diamont) will be left begging as Brooke (Katherine Kelly Lang) threatens to leave him on the Sept. 18, 2017 episode of “The Bold and the Beautiful.” CBS

Their marriage won’t be the only one that’s threatened however, as Quinn (Rena Sofer) and Eric’s (John McCook) recently rekindled relationship will also continue to face the threat that Sheila (Kimberlin Brown) intends to pose on it.

Since coming back to L.A. and realizing Eric had taken Quinn back, Sheila has been more determined than ever to break apart the couple’s marriage and make herself Mrs. Forrester once again. Thus far, her plans haven’t worked in her favor yet, and she hasn’t been able to successfully set Quinn up to look like she was cheating on Eric again. However, she will still feel she has a chance, and will call upon Charlie (Dick Christie) to continue helping her succeed with her ultimate goal.

“My brains with your brawn?” she says to him in a preview clip. “We’re going to expose Quinn for the cheater that she really is. We’re taking her down, Charlie.”

Charlie however, is nervous about the concept of getting involved in Eric and Quinn’s marriage, let alone helping Sheila break them up. Though he would love to see Quinn lose everything because he has always been suspicious of her and can’t let go of or forget the things she had done in the past, he also doesn’t want to do anything that hurts Eric—and he knows helping Sheila is a direct pathway to doing the very thing he is hoping to avoid.

“The Bold and the Beautiful” airs weekdays at 1:30 p.m. on CBS.