I agree with TD ... i have a sister 9years older and even to this day she still treats me like i'm soooo much younger than her. We were never parallel on any of our roads in life ... eg, when i was in school she was in the workforce, when she was married i just started to date boyfriends ...when she had a mortgage i was renting ... when she had her 1st baby i was in a serious relationship ... when her son almost started secondary school i just had my 1st baby ... it goes on & on.

Only things we did about the same time was she got her drivers license when she was older & i younger ... and she travelled overseas for the 1st time in her 30's & i did younger in my 20's.

But i must admit our personalities are very different to each other ... and not much common interests ... so that probably wouldn't help in a very big way either and when i think of it probably is the main factor as to why we don't get along more over than an actual 9year age gap