bethenny frankel us weekly red halter one-piece bathing suit post-baby body three weeks

Bethenny Frankel is one red hot mama just three weeks after giving birth. Photo courtesy of Us Weekly

It's hard to believe that just three weeks ago, "Real Housewife" Bethenny Frankel was busting out of maternity tops, downing pints of ice cream, and complaining about swollen ankles.

In a fraction of a trimester, the queen of the Skinny Girl empire has morphed back into almost pre-baby shape, dropping 29 of the 35 pounds she gained while pregnant with daughter Bryn Hoppy.

Frankel appears in the current issue of Us Weekly, sporting a sexy, size 4 bathing suit and high heels (shown left), claiming that 30-minute walks, scant, mostly vegetarian meals, and breast-feeding have helped her transform her body in an abbreviated three weeks.

This is the same mom who was boasting in tweets about her nocturnal, full-fat ice cream pig-outs before her March wedding to Jason Hoppy (their daughter was born May 8, one month premature).

Sigh. Yet another celebrity mom (hello, Gisele!) making mere mortal mothers feel guilty about their clinging gestational girth.

Still, Peg Moline, editor-in-chief of Fit Pregnancy magazine, suggests that the reality star needs a reality check.

"I worry about the message that sends to the rest of us out here, who aren't invested in that 'Skinny Girl' persona and don't have trainers," Moline told the New York Post.

Moline also tells the newspaper the rapid weight loss also makes her question if Frankel is getting enough rest, eating adequately, and taking care of herself.

Frankel, who has admitted to having a complex relationship with food dating back to her youth, is sticking up for her 122-pound frame. She insists that she is following a doctor-recommended diet and exercise plan, and attributes most of her speedy weight loss to nursing as well as the medically imposed two days of fasting that followed Bryn's Cesarean-section delivery.

Read what the reality star told our sister site, That's Fit, about her speedy weight loss.

And check out other incredible post-baby bodies.

Meanwhile, Frankel's new Bravo reality show, which focuses on the months leading up to her wedding and Bryn's birth, premieres June 10.