Kaley Cuoco's husband thinks they look like siblings in 'sexy' selfie

What happens when a sexy selfie goes awry?

Kaley Cuoco found herself in that hilarious predicament after she shared a so-called "sexy" snap of herself and her husband, equestrian Karl Cook to Instagram February 21.

In the pic, the 33-year-old Big Bang Theory star wraps her arms around Cook, 27, as they both give the camera a Blue Steel stare.

"I thought this picture was so sexy until @mrtankcook said we looked like siblings," the actress captioned the sultry pic. "Moment over."

The couple has a knack for taking their funny, awkward moments of their relationship and sharing with their fans. Like the time when she filmed him while he was partially nude in the shower (see video, at top!). Or sharing an sweet, yet intentionally unflattering photo of him when professing her true love.

Or practising starting a family by "borrowing" a friend's newborn. (Which, c'mon, is too stinkin' cute!)

Cuoco wed Cook last May.

They couple shared beautiful photos of their European honeymoon in December.