She was still secretly drinking behind her husband's back after swearing she would stop, and now, after realizing Brooke (Katherine Kelly Lang) told Bill (Don Diamont) the truth, Katie (Heather Tom) will have a vicious reaction on The Bold and the Beautiful.

She began drinking heavily after learning that Brooke still had feelings for Bill, and though her sister hasn't made any moves on her husband and he has seemed intent on being loyal to her, her insecurities over the same situation happening in the past led her to the bottle. After Brooke discovered she was still drinking, Katie swore her sister to secrecy-and Brooke then went to Bill and guided him to find Katie's secret stash. Now, after Katie returns home and sees the two together-and realizes Bill now knows the truth, she will turn on Brooke.

Unwilling to confront her own problem, Katie will lash out when Bill defends Brooke against Katie's accusations that she is trying to sabotage their marriage, and she will become convinced once again that the two are secretly sneaking around behind her back again.

"It is enough," she angrily says in a preview clip for the Monday, April 18 episode. "I have had enough of her trying to convince me that there is nothing going on between you two when clearly there is."

However, when Bill likely doesn't react well to her trying to turn the situation around on both him and Brooke, Katie will need to apply a different tactic, reminding her husband how much she loves him-and reminding him that she could fall apart without him by her side.

"I don't want to live without you. I can't live without you," she cries in the clip.

The change in her moods will then likely alarm Bill, because it could prove his theory that Katie is suffering from depression again-and since she wasn't pregnant this time around, it's more than what was previously seen as a case of postpartum, and she may need serious help.

The Bold and the Beautiful airs Monday-Friday at 1:30 p.m. on CBS.

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The Bold and the Beautiful, CBS, Soap Operas