I am initiating divorce proceedings with my spouse upon discovering that the child I have been raising is not biologically mine.

A couple of weeks ago, I discovered that my wife cheated on me six years ago. I learned this from her sister during a visit to check on the delivery of her first child. My wife confessed to her sister that she had drunkenly slept with her best friend. She expressed deep remorse.

At the time, I was with my “son,” and immediately after learning this news, I sought a paternity test out of fear. The results confirmed my fears — the child is not biologically mine. This revelation changed how I viewed the boy, now more like an acquaintance than a son. Armed with evidence, I confronted my wife one night while the child slept. I didn’t disclose my source of information.

Subsequently, I initiated divorce proceedings. My wife was devastated and swore she had been faithful since the incident. Despite her pleas, I remained steadfast in my decision. During our discussions, she threatened to seek full custody of the child. Frustrated, I relinquished any claim to the child and insisted she take full responsibility.

A week has passed since then. I remain in our shared home, which is in my name. My wife and the child have moved to her parents’ house. She hasn’t contacted me since our altercation. My parents support my decision to distance myself from a situation that brings me pain.

I’m currently undergoing therapy to cope with the emotional turmoil. My therapist assures me that leaving behind sources of pain is a crucial first step. Despite this, the dissolution of my family weighs heavily on me.

As for why my sister-in-law revealed the truth, she felt guilty witnessing my happiness with the child, knowing his true parentage. Her guilt overwhelmed her, leading to her confession. While I harbor resentment towards my wife and conflicting emotions towards the child, I recognize the need to move forward.