Boris Johnson’s sister made the very surprising revelation during the shocker live nominations.

When the married mother-of-three was asked to put one of her fellow housemates up for the public vote, she just couldn’t hold back.

Rachel started: “My second nomination is gorgeous Jonny because I find him so attractive that I don’t trust myself around him.”

However, her reason wasn’t good enough for Big Brother and host Emma Willis was forced to jump in.

“I’ve been told it’s a compliment, not a valid reason,” she declared.

But Rachel, 52, was adamant and continued: “No, it’s a reason. I’m a married woman and he’s a single guy and I regard that as a completely valid reason.”

Emma asked: ”So that's temptation?”

Agreeing with the stunning presenter, Rachel added: “He’s just too much of a temptation.”

The episode ended with India Willoughby and Love Island star Jonny getting the most votes.

The two housemates will face the public vote and risk being evicted during the live show on Friday night.

Celebrity Big Brother continues tonight at 9pm on Channel 5.