Thankx.....
There is no specific article that comes right out and says that Billy and Chris Senior got into a fight. However, Sheriff Reader did say that LE discovered that there were 2 unreported fights before the murders and it's said within the context of involving the Rhoden family.
Also, I do remember reading an article that stated that both Billy and Jake went to the Rhodens to discuss custody. I do not expect anyone to take what I say as fact unless or until I can find the articles and link them.
I can look for the articles if anyone is interested in reading them. I wish I had known that I would want to access the articles now, 3 years on. Can you believe it's now been 3 years?
My 2 Cents... Yes LM was referencing only Sophia. Paternity had not yet been established for Kylie and custody depended on the paternity DNA test results.
And I do not for a minute think Jake thought (as he had stated)
there was a 50/50 chance he was Kylie's dad. Lies...

...Hanna getting pregnant by another man was a driving force in the murders.
Jake said he thought it was just a phase for Hanna (their break up) and she'd come back to him. Fred said she considered them married, quite telling in her interview.
........Only My 2 Cents.........