EXCLUSIVE: Watch 'Bachelorette' Kaitlyn Bristowe Tell Shawn B. That She Slept With Nick: 'It Went Too Far'

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There's a Bachelorette bombshell headed our way in tonight's all-new episode, and poor Shawn Booth's heart is the main target.

Ever since Kaitlyn Bristowe was caught on camera having sex (awkward noises and all!) with late-to-the-game suitor Nick Viall, the Bachelorette has been tip-toeing around the truth when it came to the other guys -- but all that is about to change.

On tonight's sure-to-be jaw-dropping chapter, the 30-year-old professional dancer is ready to come clean about her premature sleepover -- and only ETonline has your exclusive sneak peek at her highly anticipated confession to fan favorite Shawn B.

WATCH: 'Bachelorette' Kaitlyn Bristowe Addresses 'Awkward' On-Camera Sex Noises!

"I don’t even know how to say this," Bristowe says timidly in our first look video above.

"It's alright," Shawn sweetly interjects, completely oblivious to the gut-wrenching blow headed his way. "You can say whatever you need to say,"

With a deep breath and a long tension-packed pause, Bristowe admits to the Ryan Gosling lookalike what really happened on her San Antonio date with Viall.

"I know that your biggest thing is trust, and I haven't talked to anybody else about this -- I just know that I wanted to talk to you about it," she says. "You know I had that one-on-one date with Nick? At night we went back to my place and I just feel like it went too far."

And with those last four words it was like we could hear Shawn B.'s heart shatter into a million itty-bitty pieces.

The Bachelorette
airs tonight at 8 p.m. ET/PT on ABC.

What do you think of Kaitlyn's confession? How do you think Shawn B. will take the news? Sahre your Bachelorette thoughts with @LeanneAguilera on Twitter.