Is she the 1st time doing lingering shoots?
Doesn't she have another friend (male/female) during the shoot even though she is a professional model.
For your info, not every model will bring a friend for the shoot. I've shot professional/non professional models and talents even for nude shoot, and though I don't stop them from bring a friend, till date only one have bought a friend. The day when every model have to bring a friend for a shoot, that will be a sad day for the image of photographers in SG.