[UPDATE 2] AITA for refusing to pay my sister’s wedding expenses after she called my child a “mistake”?

A cozy Oktoberfest outing should’ve been a joyful memory for a family, but for one woman, it unraveled a heartbreaking truth. Her adopted daughter, Decker, revealed that her aunt Clara had been secretly tormenting her, calling her a “stray” and “not real family.” The discovery of cruel texts, followed by Clara’s drunken confrontation and physical assault, pushed this mom to a breaking point—cutting financial support for Clara’s wedding and seeking a protective order.

As Clara’s unhinged behavior spirals, the woman grapples with guilt over abandoning her sisterly role. Readers feel her anguish, left asking: when does protecting your family mean severing ties with a sibling?

This Reddit update, a follow-up to her original post (For those who want to read the previous part) original post, UPDATE 1

‘[UPDATE 2] AITA for refusing to pay my sister’s wedding expenses after she called my child a “mistake”?’

A family outing turned into a nightmare when a mother learned her sister had been emotionally abusing her daughter. Clara’s cruel texts, calling Decker a “lost puppy” and urging her to “snitch,” followed by a physical assault, reveal a toxic mix of jealousy and instability. The mother’s decision to cut financial support and go low contact was a desperate bid to shield her family.

This situation screams of unresolved trauma and mental health crises. Dr. Karyl McBride, an expert on narcissistic family dynamics, notes, “Siblings struggling with loss or mental health issues may lash out at those closest to them, targeting vulnerable family members” (Psychology Today). Clara’s fixation on Decker, coupled with her substance abuse, suggests a deeper breakdown, possibly triggered by grief or envy.

This reflects a broader issue: family dysfunction can escalate into abuse when mental health is ignored. A 2023 study by the National Alliance on Mental Illness found that 60% of families with untreated mental health issues report toxic behaviors (NAMI). Clara’s actions—texting vitriol and assaulting her sister—crossed unforgivable lines.

The mother’s protective order and school safeguards are smart steps. She could also seek family therapy for Decker to process the trauma and explore support groups for herself.

Here’s the input from the Reddit crowd:

Reddit didn’t mince words, rallying behind the mother and urging her to prioritize her family’s safety. Here’s a taste of their fiery reactions:

These Reddit takes spark a question: is cutting Clara off the only way, or could intervention save her?

This mother’s fierce stand to protect her daughter from a sister’s cruelty reveals the painful cost of family loyalty. Clara’s abusive texts, physical assault, and unhinged accusations tore apart a once-close bond, forcing a protective order and a family divide. Yet the mother’s guilt lingers—can she ever reconcile with her sister? What would you do if a sibling turned toxic toward your child? Share your stories, advice, or opinions below—how do you balance love for a sibling with safeguarding your family?