Thank you all for your input. I have things set up for a reason, and I have been nice about until now. I have mentioned several times if they want me to feed him lunch on Friday, to bring him at 11.
I believe she will think I am favouring my own daughter by making her son nap/ have quiet time while mine gets to watch a movie. In a way I am, its my time to spend some one on one time with her and honestly, I have enough trouble keeping my own daughter quiet, let alone worrying about two kids. I like to recharge during quiet time, and I deserve it. I will definitely be talking to them at pick up. Thanks everyone!