I'm thinking of the time my cousin made me finger her under the sheets. She was 18 and I was 13.
How do you feel about this memory?
It happened a long time ago, I think when I was 13.
If you were forced to engage in a sexual act by someone much older than you when you were a minor, that could considered sexual assault and possibly statutory rape. A family member took advantage of your young age to engage in those acts and that is something very wrong and illegal. It would be a good idea to discuss what happened with a mental health therapist in order to process the emotions surrounding the event and to ensure that your mental health has been unaffected.
This is why I think therapy helps you. It's good to talk with someone you trust.
I'm glad you've come to that conclusion about therapy. It really does help to tell your troubles to people in your life.