When I was 3 years old, my sibling, who was 6 at the time, began sexually experimenting on me. She had never been abused herself as far as I know, but she had been exposed to pornography, and she kept doing this with me for months, eventually pulling her friends into it too. I can't find any information or support that speaks to this specific situation. I want to understand why it happened.

Thank you so much for sharing something so personal with us. What happened to you was real and I am sorry it has been challenging to find information related to this specific type of abuse. You are not alone. 

COCSA, or child-on-child sexual abuse, is already under-researched. Add a very young age, a sibling relationship, pornography as a likely cause, and other children pulled in, and the research gets even thinner. That's not because your experience is rare or too strange to be real. It's because the field hasn't caught up. Most funding and attention go toward adult perpetrators, since that's where the legal system focuses. Sibling and peer abuse rarely reaches courts, so it rarely gets studied, and what little research exists mostly covers teenagers with a big age gap or a known abuse history in the child who caused harm. Your situation, at age 3, with a sibling who had no known abuse history of her own, just doesn't have a body of research written for it yet. That gap is a failure of the field, not a sign that something's wrong with your story.

You were three. You couldn't consent, and you couldn't protect yourself. You were harmed, repeatedly, by someone who had power over you through age and closeness. None of that was yours to carry.

The pornography piece matters. Young kids learn by imitation. A child who sees explicit sexual content before she has any way to understand it will sometimes act it out on someone smaller. That's not the same as an adult perpetrator's intent, and it doesn't mean she understood what she was doing to you. It's an explanation, not an excuse. Bringing her friends in likely means the behavior had started to feel normal to her, not that she set out to hurt you further, though it still did.

Whatever you feel now, confusion, grief, trouble trusting your own memories, fits how abuse at that age tends to show up later. It often lives in the body before it lives in words. That can look like tension, a constant sense of being on guard, or a feeling you can't quite name rather than a clear memory. None of that means you're overreacting or getting it wrong.

Call the Stop It Now helpline (1-888-773-8368) when you're ready. They're trained specifically on child sexual abuse involving other children and will understand the nuance here better than a general crisis line. If you look for a therapist later, find one who works with early childhood trauma. EMDR and Somatic Experiencing work through the body rather than requiring a clean verbal story, and both have strong track records with abuse that happened before a child had words for it.

Healing from something that started this early doesn't mean uncovering some perfect memory or finding a tidy explanation for why it happened. Most of the time it's slower and less linear than that. It looks like your body slowly learning it's safe now, in small, repeated ways. It looks like the tension you carry easing, even a little, even before you fully understand where it came from. People who experienced abuse this young do build real safety, real trust, and real ease in their bodies again. You're already doing part of that work by asking why, by refusing to accept silence as an answer, and by looking for people who can hold this with you instead of carrying it alone. Thank you for trusting us with this.