AITA for teaching my son to call me dad against his mother’s wishes?

A man recently learned he fathered a child from a 2016 one-night stand after a mutual connection informed him the boy’s mother had married another man who adopted the child without his knowledge or consent. After legal battles, including forcing a paternity test, he secured every-other-weekend visitation and plans to pursue 50/50 custody.

What makes the story more complicated is the emotional layering: during visits, he gently suggested his 6-year-old son could call him “dad” instead of “Mr. Lastname” as instructed by the mother. The boy did so comfortably, but when the mother discovered it, she accused him of parental alienation, insisted he’s merely a sperm donor, and threatened court action—sparking debate over his role versus the adoptive father’s.

‘AITA for teaching my son to call me dad against his mother’s wishes?’

The father recounts how he unexpectedly learned about his biological son years after a casual encounter.

Through legal action, he established paternity and gained visitation rights despite opposition.

Visits went well until the mother reacted strongly to the child using “dad” for his biological father.

This case touches on complex issues of biological versus adoptive parenthood, parental rights, and the ethics of withholding paternity information. The father’s pursuit of involvement stems from discovering he was denied knowledge of his child, leading to successful legal recognition based on lack of consent to the adoption.

Supporters emphasize his right to a relationship, noting the mother’s actions created the disruption by not disclosing the pregnancy. Allowing the child to use “dad” reflects reality—he has two father figures—and many children in blended families navigate multiple parental titles comfortably.

Critics might argue pushing for more custody risks instability for a child raised primarily by the adoptive family. Yet broader views often condemn concealing biological parentage, as it can lead to future resentment or identity issues. Prioritizing the child’s well-being, including potential therapy, remains key amid ongoing conflict.

Here’s the feedback from the Reddit community:

Many users strongly supported the father, praising his efforts to build a relationship and rejecting the mother’s claims.

A few commenters suggested focusing on the child’s emotional needs or alternative approaches.

Others expressed skepticism or urged caution for the child’s sake.

The father’s gentle encouragement for his son to use “dad” was seen by most as reasonable given his biological role and legal rights, especially after being excluded initially. The situation underscores the lasting impact of decisions around paternity disclosure on everyone involved, particularly the child.

Do you think biological fathers always deserve a chance to parent, even years later? How should courts balance stability for adoptive families with newly established biological rights—and what role should therapy play for children in these transitions?