The other snaps in the post included her in a Pink bikini with Posy, her older children having fun, and a picture of her lunch.
While many comments praised Tammy for normalising breastfeeding with the photo, the post was also inundated with perverted comments that sexualised the act.
"What a very lucky kid," one troll said. "I wish I was that baby."
"Easy there baby, save some for me," another commented.
"I'm trying to be that baby for real."
The vile comments kept rolling in, but many of Tammy's followers were quick to shut them down.
"Stop sexualising something so natural," one said. "It's disgusting."
Another wrote, "You all need professional help. Gross."
"This is the most natural thing in the entire world," said another.
"Thank you Tammy for normalising breastfeeding."
At the time of writing, the influencer had not yet addressed the vile comments.
The Queenslander has been applauded for being so open and honest about her motherhood journey.
Tammy made headlines back in June after sharing footage from the birth of her baby girl, one week on from the dramatic event.
The fitness mogul opened her 10-minute YouTube video by announcing just before 11pm she was in labour with painful contractions, and would take a shower before heading to hospital.
