Cheating Spells Breakup For Shawn Booth And Kaitlyn Bristowe? Brunette Threatens 'The Bachelorette' Couple's Engagement?

"The Bachelorette" stars Kaitlyn Bristowe and Shawn Booth are hounded with breakup rumors once again as the fitness instructor was allegedly seeing a mystery brunette on the sly.

A new allegation from Star Magazine, as pointed out by Celebrity Dirty Laundry, Shawn Booth reportedly cheated on Kaitlyn Bristowe by going out on a romantic date with the beautiful brunette in Connecticut.

The witness purportedly said, "Shawn kept his dark shades on the entire two hours he was there with the girl. She was very pretty even with no make-up on. The two of them were laughing and she would randomly lean in and whisper in his ear."

The witness also claimed that Shawn Booth excused himself at one point to make a phone call, which prompted CDL to speculate that maybe he was calling "The Bachelorette" star Kaitlyn Bristowe to lie about where he was.

Kaitlyn Bristowe and Shawn Booth have been hounded with breakup rumors every since they came out in public with their relationship. The fitness buff received the final rose in a twist as fans were expecting that Nick Viall would end up as the big winner in "The Bachelorette."

Meanwhile, the reality star has been warding off the breakup rumors by making her Instagram account her personal love note for her boyfriend.

"The Bachelorette" star gushed about boyfriend Shawn Booth on her Instagram as Kaitlyn Bristowe wrote, "Getting to spend so much time with Shawn is making me soft! Can't keep it in... sharing why he's the one for me on my blog. #meanttobe #smitten (heart emojis)"

In another post, Kaitlyn Bristowe posted a photo with Shawn Booth while they were out on a romantic dinner. She captioned the image, "@theknickNYC had us while filming and we loved it so much we had to go back! Such a nice little dinner date at @CPattheknick (heart emoji)"