I felt bad for this model - she seemed really uncomfortable half the time, and the other half she was almost falling asleep.
Life modeling is hard on older people. I did life modeling when I was in my 20s and I remember that it was usually not a pleasant experience - it's tough sitting there naked in public, holding perfectly still for 20 minutes at a time even when you're young. With these older models, it feels like they're being crucified. Makes it hard to concentrate on pure art out of empathy.