Over the weekend, former Royal Marine and Gladiators star David was accused of exchanging messages with an adult movie star via Facebook.
However, his rep issued a statement saying David's Facebook account had been hacked and he wasn't the man behind the messages.
And, showing she isn't fazed by the allegations, 34-year-old Kelly was quick to poke fun at the story, uploading a photo of David to Instagram on Sunday night (13 April) showing him hard at work in the kitchen.
She added the caption: "Get off Facebook and get back in the Kitchen lol."
Model and actress Kelly became engaged to David in March 2014, just twelve weeks after they started dating. Although some were surprised at the speed their relationship is progressing, Kelly has assured everyone she knows what she is doing.
Responding to a Twitter user last week who questioned if she'd actually make it down the aisle, Kelly said: "Wow, you're a relationship expert? Thanks for the kind words and support. BEYOND… Thanks for the "genuine" concern. I think I'll be alright."
Kelly and David are currently over in LA where Kelly is filming the pilot for an NBC sitcom called One Big Happy, alongside former 24 star Elisha Cuthbert.
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Celebrities who became engaged in 2014 in pictures:
Copyright: Instagram kayascods