I'm the third oldest (there are 10 girls), and Millie was never actually homeschooled (she finished high school and went on to college, as well as having a few jobs). She actually didn't/doesn't spend that much time at home and was never as actively involved in the parenting role as my younger sister Renee (I was never either, as I don't believe that's what siblings are there for). We both love our siblings a ton and get along with them great, but I believe anybody in a large family will start feeling like they need attention and as the oldest it is probably more so that.

Back a few years she was extremely against marriage and vowed she would never, ever have a boyfriend or get married. That is now past and she constantly talks about marrying her boyfriend. She also started an affair with a man 20 years her senior when she was around 23, and proceeded to try to break up his marriage. Fortunately her best friend and I stopped that before it got too bad (more so because she'd met him on the internet and we were worried for her safety). She has always done and said things that would shock people (after piano lessons she would share all the ways she had shocked and made our piano teacher exclaim "MILLIE!!" and would be proud of how she almost gave the teacher a heart attack). I didn't give out enough details in my post but with her previous history I can't help but think it's a cry for attention. Not in a bad way - goodness knows my parents had enough to deal with without giving everybody the individual care - but there is an age where I believe you have to get help, if you are depressed or troubled, or change your life for the better. I think her time is overdue for that and instead of lashing out at online people and people in life who are just living, I wanted to help her become happier. That is all. Happy and secure people don't put others down and I know Millie isn't happy.

Thanks for your reply, however I realize reddit wasn't really the place to get this advice, Cheers!