AceShowbiz -

Heidi Klum is never hesitant to show off her assets. The 42-year-old model surprised her 1.8 million followers on Instagram by posting on September 6 a photo of her derriere being patted with a "naughty spoon."

The black-and-white photo showed her denim skirt being lifted up, putting her bum on full display. It appeared that her bum got "spanked" by an unidentified man's hand holding a big spoon which read, "The Naughty Spoon." Klum cheekily captioned it, "Ouch."

The model who was branded by Donald Trump "no longer a 10" had previously posted on the social media daring pictures of herself. Back in 2010, Klum joked about her naked parents in an interview with Taller magazine. "My parents are still naked," she said. "I mean, it's not like we're hippies and we run around naked, but if they happened to be in their room changing or something or someone comes out of the shower, they're not, like, 'Oh my, God. No. Close the door!' "

Regarding her racy photos, Klum told Us Weekly last year, "[I feel sexiest] when I'm shooting, to be honest, the less I have on. Many people maybe are the opposite, like maybe they [prefer to be] more dressed. But the less clothes I have on, the easier it is for me to shoot, and the sexier I feel."