Reminds me of a friend of mine. Babysat for a pair of twins, super sweet, but their parents were not only disconnected from both of them (both had long jobs, spent a lot of time on nights out with their friends, etc), but also liked to skimp on my friend's pay (barely above minimum wage). Now, my mate's not a vengeful girl, she hung out with the twins, did her homework, made them dinner, etc. But, one night the parents and my friend got into an argument over pay, where my friend decided to just drop it. Now, how did she react? She started teaching the twins how to draw, how to bake, even how to ride their bikes (not out of pressure on the kids, the kids wanted to learn, one wanting to draw and one wanting to bake and bike). Eventually the twins started calling her "sissy", making drawings for her, loving her like she was a close relative. Cut to about 5-6 months after the argument, and one of the twins got an award for a drawing she made, and what was it? A drawing of the twins and her, making jewelry and doing makeup, titled "Sissy and Us". The parents were hella uncomfortable about it, the mom even got a bit angry cause "wasn't it supposed to be a family photo" (or something like that, this story is being recalled as a 2nd hand account and I heard the story a long time ago) or something. My friend took it as a bit of petty revenge, especially since the parents didn't stop hiring her to babysit, and the twins never stopped loving her. There wasn't really a satisfying confrontation or anything like that, my friend sat for the twins until they were old enough to stay home alone, but she did stick around as their tutor. Eventually the parents did start being nicer to my friend, inviting her over for Sunday dinner and stuff, so I guess there's that. Silver linings and whatnot.