Lisa Wu Hartwell of “Real Housewives of Atlanta” played a fitness instructor last night on “Tyler Perry’s Meet the Browns,” and she did not embarrass herself.

Hartwell showed up 14 minutes into the episode. Mr. Brown was diagnosed with diabetes so he joins an exercise class. Derek, to get him to go, said he’d do it with him, then reneges. But Hartwell’s character Jenny walks in so Derek decides to stay in the class.

Hartwell showed off her fit body in a light blue tank top and darker blue pants.

Her exercise moves quickly tucker out Brown, who collapses in a heap. Cut to commercial.

Later, we see Brown getting tested by docs at the hospital fitness center. He finds out he could stay off drugs if he maintains a decent exercise and diet routine. Derek tries to hit on Hartwell’s character one more time. She tells him to do 50 pushups and she’d consider it. While he is doing it, she leaves with a bulkier and hunkier dude.

“You’re on the those desperate housewives anyway!” Derek said, realizing he’s been punked.