A few words on..."The Photos"

When reading "The Photos", it seemed more like a story, it is written in a way unlike any of the other poems we, or better said, I have read. After more exploration I noticed all of Wakoski's poems are in a way, very unorthodox. Her writing is very complex, fun, colloquial and still very... ambiguous. 

"The Photos" tells the instance where the speaker and her sister examine a photo with their father in it. they discover it was a photo intended for his second wife, the one he left their mother for. Their mother an old "sad rag bag of a woman" asks to see it, and the speaker questions this instance. Did they unconsciously want to hurt their mother? Why did they even let her see it? But she moves on and drives home. But it is their where she sees her reflection, and "hates her destiny".

Does she feel her mother's condition and "luck" is destined to clench her life as well? There is still many things to figure out. Any help would be greatly appreciated. The line "I have killed my children" definitely intrigues me. I fear the poem is not as simple as it seems, or perhaps it is...