Have two brothers and no, never jealous and they are very, very well off financially and are happy with their spouses and/or family. However, I always wondered if I had had sisters if I would have been jealous if they didn't have to work or had a job that they loved ( I always worked and resented it as I did not have a job that I loved), or they had children as I didn't, or if they had a nice self-contained home to live in, I live in a condo. I know I'm weird, but I do tend to be more jealous of females over males about stuff.