The star proudly showed off the hard work she's been putting into her fitness regimen, gamely flaunting her gams after a gym workout.
And apparently, the operative word for Jess these days is ... flex!
"These are my legs during a workout today!" she wrote Saturday in an Instagram post.
"I'm proud of myself. Thx @tkrefting and @harleypasternak #nofilter," she added as she gave a shout-out to her partners in fitness, trainers Teri Ann Krefting and Harley Pasternak.
The again, the 33-year-old mom of two has been far from modest about flashing her God-given gifts – or showing off the fruits of her training at the gym.
Last November – just four months after giving birth to her second child, son Ace Knute – the budding fashion mogul displayed her svelte post-baby body in a snapshot from her Weight Watchers commercial shoot.
More recently, she took to Instagram to flash ample thigh and dècolletage in a playful pic as she attended the White House Correspondents' Dinner.