Jessica Simpson Takes Her Bump for a Workout

By Maggie Coughlan

02/07/2013 at 04:00 PM EST

Now that's a bump!

While heading to the gym on Wednesday, an expectant Jessica Simpson was photographed in Los Angeles wearing a form-fitting black top that showed off her growing belly.

Shielded by sunglasses, Simpson, 32, looked relaxed in comfy green sweatpants and her hair up in a high ponytail.

The Weight Watchers spokeswoman is expecting her second child with fiancé Eric Johnson. The couple are already parents to 9-month-old daughter, Maxwell Drew.

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But the mommy mogul is doing more than just expanding her family, she's also taking on a maternity-focused business venture. Simpson recently partnered with Destination Maternity to feature her designs at over 800 stores.