Were we wrong?~ Sexuality

Back when I was in elementary school- I had a younger friend that lived across the street from me. She would come over afterschool when no one was home and we'd chill. Eventually we found out what born was and that is when sexuality came into the picture. At one point in time me and her started doing explicit things one day.. To try things. But my older sister came home and gave us the dirtiest look. I understand we were young but we were just exploring. I mean now we are both high school students.

Plus she's a hypocrite these days she considers herself a bisexual, so what did we do so wrong? And these days I am uncomfortable with exploring my sexuality because of that incident. Were we wrong as kids?