Sandria caring for her father some time before his death. Her attitude is suppressed rage and exhaustion, she is so angry with him. Her mother died long ago, and she never formed a proper relationship with her brothers and sisters. In fact, she never could quite burst from her detachment from them. They were pretty much nothing to her, only her and her father seemed real.
The last two short lines represent her moving from one thought to another, but she doesn't realize that she is doing this. And the last phrase is telegraphing where the narrative thread of this book is going.