Ratajkowski, who gave birth to her child Sylvester on March 8, received mixed responses after the 29-year-old took to Instagram on Wednesday and posted a breastfeeding photo with the caption: "Beautiful boy."
Some of the new mother's followers - like English model Poppy Delevingne - gushed over the parenting post, saying Ratajkowski is giving them baby fever.
"Hi sweetie pie!" commented model Ashley Graham.
However, beneath the slew of verified, celebrity comments, many netizens were wondering why Ratajkowski was reneging on her gender-related assertions.
"Maybe my memory is becoming bad, but I thought you said the baby was going to tell you the preferred gender once old enough," remarked Instagram user @estplorin.
Naturally, the post made it over to Twitter, where more netizens weighed in on the post, which has received well over 2 million likes on Instagram. Once again, responses were mixed.
The 29-year-old has yet to respond to the negative backlash, but she did post a photo on her Instagram story on Thursday, showing off her newborn's new socks.