Former TOWIE star Sam posted the snap on Instagram, and it shows her feeding her little boy while chatting to her niece Nelly, who has just returned from a holiday abroad.
Captioning the shot, she said: "Love my family, missed my sister and nelly soo much. #madhouse #family #love #feedingtime xxx."
However, while scores of fans were quick to commend Sam for her public display, others have not been quite so enthusiastic.
One commented: "Breastfeeding doesn't need attention or promoting. I know there's stigma attached but it's 2016, millions of women breastfeed without posting pictures. Just concentrate on feeding your baby and that's it."
Another added: "I think it's a private bond between you and your child, why should thousands of other people get to see it?"
Although Sam has not responded to the negative comments herself, hundreds of fans have jumped to the mum-of-one's defence.
"Breastfeeding is as natural as you get .. She is a great mother - you're a role model to me too," one follower shot back.
Other comments included: "So happy to see you promoting breastfeeding, you're doing a fab job. High five from one boobing mama to another."
This is not the first time Sam has breastfed in public. Throughout her own reality series, Sam Faiers: The Mummy Diaries, she was often seen feeding Paul and she even fed him during a live TV appearance on This Morning last month.
Sam was running late for her scheduled slot with ITV and Paul needed feeding, so she did it during her interview with Phillip Schofield and Holly Willoughby.
Speaking to Reveal following her appearance, Sam thanks fans for being supportive. She said: "I'm so happy [with the positive reaction]. When I got there, after four hours stuck in traffic, I was panicking and Holly [Willoughby] said, 'Just feed him'.
"Paul was searching for my boob so I just said, 'Is there anything I can cover up with?' They grabbed a tea towel from the kitchen. I'd have been really embarrassed if he pulled off, though, and my whole boob was exposed on live TV!"
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