We adopted all them as teenagers, both times. It also helped that both of us were very young. We wanted an older sibling set. It was easier back then because there were no computers or cell phones for kids (this was the late 80's early 90's). We also had the mindset that we are your parents not your friend. Besides the normal teenager stuff. They tried a little scam in school to assume each other's identity when it came to taking tests, they failed miserably at this.