Light in August - First Impressions 

That sentence at the end you read could reference maybe something similar to femine and masculine energy. Just going by the word blood after the family titles. Like the parents brought parts of themselves to the child and blood - dna in body and also in personality. I dont know if such a concept like feminine and masculine energy was a concept that existed in the first half of the 20th century

re: the passage you had to read more than once. Please don't take this as anything better than a guess. "She has no mother because father blood hates with love and pride" suggested to me that the character's parents did not get along, that perhaps the mother had a lover (or chose to earn her living by prostitution -- there is a hint of that in the earlier phrase, "even if it's got a brother in it that objects to his sister's night prowling". The father decided to end the relationship because it hurt his pride. The end of that same passage, "but mother blood hates with love and cohabits" suggests to me that, had it been up to the mother, she would have stayed put, living with the husband in spite hating him and sleeping with another man or men. And the narrator is suggesting that they believe these gender-defined reactions are fairly common