Her arches are her worst spot. Her left foot is more ticklish than her right one. She has some of the softest soles I've ever touched. And she can handle it for a few seconds but that's all. I had to hold her ankles to tickle her for 30 seconds or so. It was fun.
Excellent shots, especially the wrinkled up soles shots in the second picture on the first set. Your best friend has beautiful feet. Thanks for posting those fine pics.