Oh at HER age if she woke up the babe in my house her 'options' this afternoon would be VERY limited as a result ... you did not get your break so YOU are tired, the baby did not get their nap so is tired and likely needs more 'attention' so you have less hands for doing FUN stuff .... so she would be staying on her bed even though everyone else is UP until she has rested her 30 minutes ... if you have to get her off to move on with the group - she can sit there beside you on the floor and play with a dust bunny .... if you are feeling generous let her have a book or puzzle if she is at least now being quiet ... when you go outside she sits and does nothing and watches other older kids if you have them get to do something FUN because they are well rested and have the energy to do so since they RESTED QUIET at nap time ... and at the end of the day you tell her hopefully tomorrow SHE will rest quietly and be well rested and she can play in the afternoon and have fun instead of having to 'sit' to conserve her bodies energy!

I would also be telling the parents they need to TALK to her at home about being RESPECTFUL at quiet time and resting her body quiet and perhaps try having a natural consequence at HOME as well ... you you did not rest your body today so you get NO TV or whatever loss of privilege might motivate her to comply!

BTW I am not a hard ass like that if they WEE and just honestly are not 'well' and wake up and cry out cause they are having a nightmare and wake others or cry out in teething pain ... but if you are a verbal child capable of understanding the expectation to 'rest quietly' and you are CHOOSING to be disruptive and disrespectful to the sleep needs of others - well watch out cause protecting the sleep of the others is VERY important to me!