U need to see them ASAP. Never in a million years would all ten fall off over night, did u use your usual stuff,dehydrate,bonder ect? My guess is she's not used to wearing them and had bit them all off! Check her nails for damage that would be present if she has done this? Maybe she only wanted them for a night out and now wants her money back? If her nails show signs that they have been ripped off then stand up for yourself and your work, if there is any truth in her claim then absolutly re do them as you don't want her bad mouthing you but I have never in the last 14 years ever experienced 10 nails falling off overnight. Let us know how u get on