help:)

okay so no one seems to have a clear answer for me... i am wondering how ny body will change. im 18 and have an hourglass shape i weigh around 140-145 and am 5'5. my mom has a tiny waist but bug legs and butt... i on the other hand have hips but idk if im going to have the same "luck" that my mom has which are her legs and butt? she also has kinda big arms but shes not bad for her age shes 50 and has ticht skin not really wrinkled but i wonder if im going to gain anymore weight bc ik the female body doesnt stop developing till 25...