At this point in time I'm not thinking EG killing Lucas was premeditated. If we look at the history of the alleged beatings by her, and he survived, I suspect she just gave him another beating after the LL left. And it was a whopper. And it killed him. Now she's freaking out, probably high. I'll bet she called someone she trusted. And I think that person has been talking from the get go and more since their own arrest.