You don't think maybe JA spiked his beverage with something so that she could lower his inhibitions and get him to have sex with her again even after he had severed his relationship to her once and for all?
And maybe whatever she gave him made him a little easier to attack and kill?
She is awfully small, he supposedly feared her and wanted no more to do with her and did not expect her visit, and he looks a total mess in those pics. Why would he have sex with that scary, um, woman? Unless he wasn't exactly himself?
I'm not married to it, but I think it's awfully possible.
She didn't really need to lower his inhibitions... he let her in the house.
He had not severed the relationship 'all the way'.
Whether he was shot first or stabbed... it would have been easier because he was naked in the shower.
He seems like he was taking an opportunity. Took it, but wasn't changing his mind about the overall relationship or taking her on the trip.
If she wasn't planning to kill him while he was sleeping... I think she was giving him a chance to change his mind. He didn't... she wasn't going to have him and probably felt he was using her. Nobody else is getting him. He goes to shower and she gets dressed and ready.