First .... She probably got it from the brother since he is in school ....they don't screen at school here in Ontario anymore and the health unit doesn't have an exclusion period anymore. My policy book says that the child us not permitted back until after the second treatment and depending on what treatment the parent buys it could be anywhere from 7-10 days.... And I get to check before readmittance. Since tomorrow us their last dag then yes they would be gone based on my policy. As for you and the other kids ...... Check all the kids heads as well as yours and your own kids .... You need to bag up all your stuffies/dolls ect ... Anything that can't be washed ...for two weeks.... Vacuum all carpets couches ect and wash your linens in hot water..... Lice can only live off the body for a short time (less then 2days) they do not live on pets.... You can close tomorrow if you like but as long as you or your kids don't have any lice then you don't really have to .... Any kids in daycare that have it must stay home and be treated .... That's how I would proceed ! Fun fun