What is the meaning of the sentence below?

As with so many ideas, one generally lead to another and another, and her parents probably started adding all kinds of ideas to whatever the first one was, and all their ideas would overwhelm and ruin the girl’s own original idea and plan. As a parent I have been criticized by my own kids for doing just that-taking their own idea and then making it “mine” (a parental risk when one wants to “help.”) The image here with “baby ideas” seems a bit awkward, somehow.

It is the overreaction of the teenage mind which finds the idea most terrible and fears the change that it threatens will grow to overwhelm the teenager's world. Such reactions describe things to be exponentially worse than they are as a form of panic in the face of possible change and are as colorfully descriptive as they can get.