AITA for stopping all support to my step-siblings after discovering their deceit?

For a decade, this 35-year-old man was the financial backbone for his half-siblings, aged 14 to 26, covering bills and tuition despite living states away. But when he discovered they hid their biological fathers’ return to keep his support, he felt betrayed and cut off all financial aid. Struggling with guilt but prioritizing his mental health, he believes he was used as an “ATM.”

The online community backs him, arguing he had no obligation to support them and was exploited. Some worry about the younger sibling, suggesting outreach to clarify. Was he wrong to cut ties? This story sparks debates about family loyalty, deception, and personal boundaries.

‘AITA for stopping all support to my step-siblings after discovering their deceit?’

He supported his half-siblings for years:

He thought their bond was strong:

A shocking truth came to light:

He grapples with guilt and criticism:

This story highlights the complexities of family responsibility and the sting of betrayal. The man went above and beyond by financially supporting his half-siblings, a selfless act rooted in honoring his father’s legacy. Discovering their deception about their biological fathers’ return shattered his trust, making him feel like an exploited “ATM.” His decision to cut financial support is understandable, protecting his mental health and self-respect, but it raises questions about his responsibility toward the younger sibling, especially the 14-year-old.

Family psychologist John Gottman stresses that “trust in family relationships is built on honesty and transparency” (The Seven Principles for Making Marriage Work). The stepmother and siblings’ deception, especially from adults like the 26-year-old, suggests they exploited his kindness for financial gain. This may reflect an unhealthy family dynamic, possibly driven by the stepmother’s influence, as Sensitive-Iron-5269 speculated.

Per psychologist Harriet Lerner, “setting boundaries is vital for self-protection, but consider the impact on dependents” (The Dance of Anger). His choice is justified—he has no legal or moral duty to support them, especially after betrayal. However, abruptly cutting off the younger sibling without dialogue risks emotional harm, particularly if they were coerced by the stepmother. A balanced approach might involve privately reaching out to the 14-year-old to explain while maintaining financial boundaries.

Moving forward, he should consider therapy to process guilt and anger. He could also contact older siblings to clarify their betrayal and set clear boundaries. If he wants to maintain a bond with the youngest, a gentle conversation could help. Blocking critics is reasonable, but he should focus on building his future, redirecting resources to himself and any future family.

Here’s the feedback from the Reddit community:

Most supported him for being exploited:

Some expressed concern for the younger sibling:

One questioned the story’s originality:

The stepmother and half-siblings’ deception crushed the man’s trust, justifying his decision to cut financial support to protect his self-respect. The online community backs him, stressing he had no duty to provide and was exploited. However, cutting off the younger sibling without dialogue risks emotional harm.

He should consider reaching out to the 14-year-old to clarify while maintaining financial boundaries. Should he contact the youngest to explain? How can he move past guilt? What do you think of his decision? Share your thoughts below and let’s keep this conversation going!