Jessica Simpson is really taking her pregnancy to heart, with the fashion mogul ready to conquer clothing for her fellow moms-to-be.

“I haven't really done maternity clothes because I don't really love a lot of maternity stuff, so I'm actually using it as a fun business thing to do. So the next thing you will see from the Jessica Simpson Collection is maternity,” she revealed at a TCA press conference.

So how is the reality star dressing for her expanding belly?

Jessica and Ashlee Simpson are collaborating on a fashion line for the very first time, RadarOnline.com has learned.

The clothing line will be focused on tweens, according to fashion industry bible Women's Wear Daily.

Among the items available from the mega-successful siblings will include knit tops, hoodies, pullovers, striped shrunken knits, T-shirts, drawstring pants, footwear and outerwear.