Where do ruler shaped women tend to carry weight?!

I know this may be a silly or obvious question to some, but i'm completely bewildered. I am ruler shaped (33", 25", 34",, i typed in my measurements using a body shape calculator and it concluded that i was ruler shaped) I've been small basically all my life (i'm 18 years old, now, still standing at 4'11 since junior high :/,106 lbs) so it's hard to tell where exactly i'll gain weight when i do. it's pretty much obvious to tell where hourglass and pear shaped women will gain weight, but as far as ruler shape, i just don't know. can anyone help me?

p.s. PLEASE do not tell me that if i haven't gained any weight by now, I never will. First off, that's ludicrous, second my mom was thin throughout her life until her second semester of her freshman year in college, as well as my grandmother, aunt, etc, so i know that eventually i'll be hit with weight gain. i'm in college now as well, by the way) and also please don't tell me to just look at my mom, grandmother and aunt to determine where i'll gain weight. my mom is an hourglass, grandmother is a well defined pear, and aunt is an obvious apple. so, that won't do me any good with me being ruler shaped and all.

please, and thank you.

oh, and also, do you think it's possible for a ruler shaped woman to transform into a subtle hourglass with enough weight gain and enough work on the mid-section? just curious.