Stephen Colbert thinks Homeland Security Secretary Kristi Noem’s alleged side piece should be careful about where he decides to whippet out.

Last week, The Wall Street Journal published a report that alleges that the Noem — who is famously known for shooting her own dog — is having an affair with one of her aides, Corey Lewandowski.

Both Noem, 54, and Lewandowski, 52, are married with children — and the two have denied the rumors.

People familiar with the matter, however, told the Journal that the two Trump administration officials have been traveling together on a luxury 737 MAX jet, complete with a private cabin in back — which, paired with Noem’s creepy canine history, inspired a pretty solid joke on Monday’s episode of the “Late Show.”

“If that romantic part is true,” Colbert said, referring to their alleged affair, “Corey — a word of warning: Avoid doggy style.”