Amanda Seyfried took to Instagram on Wednesday to blast social media influencer Arielle Charnas, alleging that in “flaunting her lifestyle,” she endorsed unrealistic and harmful body expectations.

The spat began when Arielle, 32, posted a bikini photo of herself captioned, “Proud of my body after two kids.”

While she received some positive feedback from her followers, others felt she was promoting an unhealthy and unattainable body image goal to her 1.2 million Instagram followers.

An unnamed friend of Seyfried’s commented on the image, “Totally fine that you’re privileged and thin, good for you (I am too-ish!) BUT if you don’t acknowledge how your wealth made your workouts/body possible, you’re just perpetuating the patriarchal (totally unrealistic) notion that mothers should ‘bounce back’ after childbirth, an impossibility for anyone who can’t afford ample childcare (which is almost everyone in this country).”

Seyfried, 33, posted a screenshot of her friend’s comment and added her own commentary, writing, “If we’re ready to get paid for flaunting our lifestyle (and inspiring some in the meantime) we have to be open to the discussions surrounding what we’re promoting.”

“We have to back ourselves up- not run away from the issues it presents. There are gray areas everywhere,” the actress continued. “Each of us has a chance to back ourselves- especially on this platform. If you know who you are- take a second to decide if what you’re throwing out there is worth it- in the big picture.”

In a second Instagram post, Seyfried, a mom herself to 2-year-old Nina, posted a selfie captioned, “INFLUENCE = POWER. And if you’re taking advantage of that- EMPOWER.”

Earlier on Thursday, Charnas’ fiancé, Brandon, defended her on Instagram. He satirically wrote that Charnas’ body is “not attainable” regardless of one’s workout regiment, and that if one does attempt to do so, “you must have at least three nannys [sic] and be sure to not only pay them but also thank them in a minimum of 4 shoutouts a week on Instagram.”

“If you can’t afford a nanny, please do not attempt to have a very successful career in order to do so,” he continued. “Only ages 30 and older are allowed to view this post, youth must be accompanied by a therapist.”

Charnas did not immediately respond to a request for comment.