First time nude with others

I've just read a few other blogs about first time nude with others so thought I would post my story. We went to the south of France with my Dad, stepmom and half sister, ( dad left my mum years earlier), I was 10 and sister was 8, she used to be on the beach just in bikini bottoms, didn't worry about bikini top then. When we went back to the camp site, her mum said to go in shower with me rather then on her own in the ladies. We didn't think anything of it as both only young so we showered together every night. After the holiday when I used to go and stay with them we shared a bath, we were both still young so nothing sexual in it, we done this for a year or so. My dad then left her mum and moved in with another woman, we didn't get to see each other much for a year or 2, then dad had us around together, I was about 13 coming on 14, she was 11 coming on 12, I went up to have a bath and she came up as well, I got in the bath and said get in as well. She did as we had always bathed or showered together, obviously our bodies had grown but we didn't think anything of it, we looked at each other but just sat in bath and joked with each other. THEN banging on bathroom door, dad new girlfriend asking what's happening, we just said we having a bath, she was shouting saying you cant be bathing together lol, we just said why not?, bla bla bla she said. Anyway, we had to share a bedroom that night, she in bed, me on camp bed, but once we knew everyone was asleep I got in bed with her,nothing sexual, just something we always done, and yer we slept nude together. Long story but to this day I think she tried to make a big deal out of something that wasnt there Gary