May 11, 2015 at 12:00 PM EDT

No one wants to think about their sibling having sex. And they definitely don’t want to listen to them sing about having sex. Lucky for Julianne Hough’s brother, Derek Hough, he only has to watch her lip sync about it, with some super provocative dance moves to match.

In this clip from an upcoming episode of Spike’s Lip Sync Battle, the two-time Dancing with the Stars champion faces off against her bro with a sultry performance of the Lonely Island’s spoof song “I Just Had Sex.”

Julianne “sings” the male POV song about getting lucky while Derek looks on in horror.

The episode will air on Thursday, May 14 at 10 p.m. ET/ 9 p.m. CT on Spike.


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