Something that I did that was very wrong that my sister doesn't even know about

when my sister was a baby i had her sit on the side of my face and pee and one time i had her playing with my dick my dad caught me and whoop me till this day only me and my dad know about this i am with new parents now but my family who are my actual brothers and sisters are here with me my sister has grown sum my new mom doesnt know should i tell her not even my little sister knows