In chapter 15 of Harper Lee's "To Kill a Mockingbird," the relationship between John and Patricia Hood, Kathy's sister, is subtly implied as strained or problematic.
How to explain
Although the specific details of their relationship are not extensively discussed, certain hints suggest underlying tension. When Scout visits Aunt Alexandra's missionary circle, she observes the ladies' subtle disapproval of certain families, including the Hoods.
Despite Kathy's sister, Patricia, belonging to the missionary circle, there's an indication that her family may not entirely align with the circle's standards or may be looked down upon by some members.
This subtle implication suggests a strained relationship or a level of disapproval between the Hoods and certain factions within Maycomb's society