Sisters never ending beef w/ ppl😭

Chat, is it just my sister who gen can't go ANYWHERE without going "omg!! It's ABCDEFG from the 7th grade.. you have no idea how badly they wronged me back then.." broski. They have MOVED ON Like ik this one girl she (sister) has "beef" with, and they are genuinely a better person now😭😭 Anyway, is this a cannon event for everyone with an older sister, or is mine just messy