You are looking at them through your own cultural lens. In their culture, their relationship was normal and probably expected. DR had FR when she was 17. HHG was a young mom. Scroll through the social feeds of their friends and family--their relationship was standard.
I am no special snowflake that needs a safe space, but I bristled at these types of statements on this particular case since the murders first took place. I commented in the early days, too. Many posters are assuming that the Pike County culture is the same as Hamilton County, or any primarily middle class community in any state. That's simply not the case. If one were a sociologist, this would be a fascinating study--how people of different socio-economic status see the victims, their lifestyles, and possible "justification" for their murders. I quote the world justification because obviously there is none...but when a multi-millionaire offers a reward for information, and then pulls it based on limited knowledge of a grow op, that says there are indeed people who believe at least some of the Rs invited their homicides.