Leave her in the hall overnight xsquared.
She'll be fine - it's character building.
She can catch and roast a whole mouse for supper (roast over a tealight - carpet fluff makes an unusual and delicious interesting stuffing).
And then roll herself up in discarded paper napkins from the party for a restful night dreaming of unicorns, or whatever it is girls dream about these days.
If there are others whose mothers are settled for Strictly, rather than selflessly collecting the fruit of their wombs from parties, then they can all form a couple of packs (a le Lord of the Flies) and the survivors can be collected in the morning.