I totally understand. You don't want her uncomfortable in her own home regardless if the circumstances! And it sounds like there are lots of reasons surrounding her taking it easy this summer! I was just surprised.

I like the idea another poster had about scheduling time with her and the boys to give the nanny a break/just making the day more predictable. I don't know it's bad for your sons to learn some boundaries related to their sister too since she won't always be in the mood to play with them. I doesn't hurt for her to he able to say, "Hey guys, I can't play right now but later I'm going to come down and we can do BLANK." And stick to it.

I understand the nannies frustration somewhat, especially if the boys really love and look up to her and listen to her and the nanny feels like she loses control of them. But the nanny needs to compromise too. The summer isn't forever. Maybe she can get them out of the house more too and let your daughter know when that will be as well so they can coordinate better!