'Skinny Girl' Bethenny Frankel Wears 4-Year-Old's Clothes

July 14, 2014 1:19 PM EDT

Bethenny Frankel, former reality TV star and owner of the “Skinnygirl” beverages line, has outraged her Instagram followers after posing in her four-year-old daughter’s clothes.

Frankel, 43, who became famous after starring on The Real Housewives of New York City, sparked horror online after dressing in her daughter Bryn’s pajamas.

She posted the photo Sunday morning along with the caption: “This is my daughter’s nightgown and PJ shorts. Think we’re ready to start sharing clothes yet?”

Most people online did not think that. User jenmo2222 wrote: “I’m sorry this isn’t cute…a grown woman shouldn’t be the size of a 4-year-old especially when they have admitted to having an eating disorder in the past…!”

Fellow Instagram user, nonniedidit echoed her sentiments, commenting: “Women shouldn’t brag about being as thin as a small child… Go eat a sandwich.”

Frankel, however, defied her critics on Twitter, tweeting Monday:

In response to a fan who offered their support Frankel wrote:

Frankel, who sold Skinnygirl in March 2011 for a reported $100 million, has admitted to struggling with her weight. In a 2010 interview with People magazine she confessed: “I was owned by dieting. “I hated myself. I was completely obsessed and consumed.”