The problem I have is, once Julie was fully aware that he wasn't just 'blowing off steam' and he had in fact just orchestrated the murder of five relatives, two of whom were children, she still delayed informing the Police!
She loved him and initially still wanted to be with him in spite of what he did. She didn't rat him out until:
1) they broke up- so she no longer had a need to remain silent
2) her friend told police what Julie had told her so police summoned her
When people have a falling out that is when they are willing to stab them in the back so the timing is not in the least bit surprising.
I can list plenty of women who got divorced then ratted out their husbands criminal actions. Just because they chose to stay silent while married and still wanted to be married to them doesn't mean that they lied about the things they said after the divorce. Most of them waited until police approached them and asked because they found evidence and then wanted to see what the ex-wives had to say.
The simple reality is that people who want to chalk up her claims to lies can't come up with any reason she would lie. The claim she did so for money holds no water at all. It is ludicrous to say she did it figuring after he got convicted she could get a big payday and since she declined so many paid opportunities after the NOTW deal it is even more obvious that line won't go anywhere.
Suggesting she made it up just to cause him trouble makes no sense either. She would not have made up a hit man story if intending to cause him problems and the notion she fed the story to her friend so her friend would contact the police and get police to contact her is also not credible.
He told her about his drugs crimes and even recruited her for them and he let her know about his theft of the caravan site. he thus trusted her. It is thus easy to see how he could trust her with his desire to kill his family. She didn't rat him out after he told her of his plans o burn it down and each time he spoke to her she didn't betray his confidence so he trusted her.
I have patiently waited for people to come up with something to undermine her claims but no one has been able to come up with any good reason to doubt her testimony.