Aitah for my reaction to what my stepmother did to my son?

Family drama can haunt you for years, especially when it involves the emotional well-being of a child. I (24F) have been dealing with an incident that happened four years ago, but it still plagues me every holiday. My stepmother—let’s call her Jill—has always been outspoken, often boasting about her opinions on everything.
While on vacation with my parents and my sister’s family, I mentioned that my 13‑year‑old son has been very active with his church and youth group—a subject close to his heart. Later that night, after my husband went to bed, Jill launched into a tirade with my sister and my son about how God isn’t real, the Bible is fiction, and the Catholic Church is a “money s**m,” among other offensive remarks.
I intervened by sending my son to bed and we left early the next day. Now, my father and Jill claim that I’m the bad guy for “overprotecting” my child. Am I wrong for reacting the way I did?
‘ Aitah for my reaction to what my stepmother did to my son?’
Dr. Laura Markham, a clinical psychologist specializing in family dynamics, explains, “When a child’s deeply held beliefs are attacked, especially by a family member who is supposed to be supportive, it can lead to lasting emotional scars. It is entirely appropriate for a parent to step in when a child is being targeted in this way.”
She adds, “While it’s important to respect different opinions, there is a line between expressing one’s views and deliberately undermining a child’s identity. In this case, the stepmother’s timing and delivery—choosing a vulnerable moment after everyone had settled for the night—was particularly damaging. Parents must advocate for their children’s emotional safety, even if that means confronting difficult family members.”
Dr. John Gottman, a relationship expert, notes, “Family relationships, especially in blended families, require clear boundaries. When those boundaries are crossed, it can erode trust and cause lasting harm. Your reaction, while emotional, reflects a necessary protective instinct. Open dialogue, and perhaps family counseling, could help mend these wounds, but your concern for your son’s well-being is completely justified.”
Let’s dive into the reactions from Reddit:
Several redditors expressed strong support for your reaction. One user commented, “If a stepmother deliberately disrespects your son’s faith and personal identity, you’re not the asshole for stepping in. Protecting your child is paramount, even if it upsets the family dynamics.”
Another commenter shared, “Your son’s emotional well-being should always come first. While it might hurt in the short term, standing up to a toxic influence like Jill is important. You did what any caring parent would do.”