Kate Hudson and Nick Jonas Credit: Valerie Macon/AFP/Getty Images; Jamie McCarthy/Getty Images

I mean, who hasn’t?! Kate Hudson once bared her ass on Instagram to make on-again, off-again fling Nick Jonas jealous, a source tells Us Weekly. The Almost Famous alum, 36, had her stylist Sophie Lopez post a photo of her naked in a bathtub on Instagram this past November.

“#JustAnotherDayAtTheOffice,” Lopez captioned the sexy snap of Hudson’s butt covered in soap suds. "Omg! You're so fired! #Fabletics 😜," Hudson commented on the sexy snap.

The timing of the photo came after the “Chains” singer, 23, had cooled things off with Hudson.

As previously reported, the pair started hooking up after Oliver Hudson — Kate’s brother and Jonas’ Scream Queens costar — reintroduced them to each other this past September. “Their connection took off,” a source explained to Us of the couple. “Things just sparked.” 

🛀🍑💛 #JustAnotherDayAtTheOffice

A photo posted by sophielopez (@sophielopez) on

The duo were first spotted at Disneyland together in late September. The following month, the twosome partied during a wild night out in New York City. “They were dancing very close,” a witness told Us. “It looked like a romantic date for the two of them.”

Despite their chemistry, it’s no-strings for now, as another source previously explained. “They are both just having fun,” the insider said. “She's just seeing this as a fun hookup thing for now."

The pair, who have kept mum about their fling, last reunited in Mammoth Lakes, California, for a ski trip earlier this month.