Many dogs do very well with their humans working during their week. As long as she has some attention and activity in the evenings and on weekends, she will be a happy girl.
My boys are accustomed to never being alone, but when they had to stay home alone, I videotaped them with my computer. They slept most of the time and walked around only a little to check the door.
Kiri isn't suffering separation anxiety, so no need to worry. No reason to feel guilty either.