Standing to her side and wearing a bikini, she captioned the cute snap, "#17weekpregnant My little love bug."
According to some of her followers, her belly just wasn't big enough, and she wasn't wearing enough clothes. Huh?
"Sorry but how can you as an expecting mother be proud of not having a stomach in the fourth month? And then feed this belly constantly and take half naked pictures," wrote one vile troll, who Belle later exposed on her Insty account.
Another user wrote, "'There is no way you're pregnant. This is a joke right?"
The Sydneysider hit back with a series of snaps featuring other mothers at the 17 week mark in their pregnancies, a perfect example of just how different women show.
"Just because I'm not showing as much as you like doesn't mean my pregnancy is 'unhealthy or that I'm promoting a 'skinny' pregnancy," she said,
"It's just my body and I can't help if it doesn't look the same as other women. Body shaming is not okay no matter how 'big' or 'small' someone is."
You tell 'em, girl!