In comics Amber was, well, a dumb blonde who assumed Mark would randomly leave her not to play Superman but to... deal drugs. Also hookdd up with a woman beater who Mark scares straight to do better. Show Amber is a colossal mistake.
But she won't and never does. At best, Atom Eve can do what she usually does in the comics (and the show, since it's closely following it) and do nothing. The best thing Eve ever did with her "limitless" state was activate it without dying first, and that only happened once.