Watching my sister
I am not sure how often this happens in a family, but my sister lets me watch her undress and wash herself in the shower and dry off after, it started when I walked into her bedroom without knocking, she was starting to undress I was going to leave but she said stay if you like and invited me to talk to her while she was showering, she is not discrete when drying herself I saw everything. I admit I was sexually aroused, Is she just trusting my as her brother, could there be another reason, we have always been close we are in our twenties.