There are some things in life that are not planned. They just happen! My sister Donna is 4 years older than me and we have never been real tight. We were just typical siblings with an age difference. We would fight all the time over just about anything, but as we got older we managed to become friends.
My sister was a wild child; I caught her more than once having sex with her boyfriends at our parents’ house. I never said anything but she knew that I knew.