Was this sexual abuse?

As a child my mom was really close friends with this one lady. My mom would babysit for her kids (6kids) and she would babysit for my mom. (me and my little sister) the oldest sibling, which was a girl and was three years older than me would take me into her room (I was about 5) and made me sit in her bed and touch her or she would touch me.. I hated it! I cried! But I never told anyone because she said I would get in trouble

This girl has ruined my childhood by acting like she was my friend one day then the next day she would bully me

She did that for about a couple of years (until I was about 7) then stopped. It got to the point where i would feel extremely guilty and ask god to forgive me every night and morning because of it and I would have nightmares about it.

It still bothers me today but I don’t know if it is really that important to mention.