Hi again.

As I've said before, killing them would only incriminate him. For me, that "one more favor" is to be sacrificated, what would happened in a few days. But the scene of the visit seeks to produce tension in the viewer and succeeds in doing so.

Regards.

While I also thought he meant to kill them, in the italian version he also says he brought them their favourite chocolate: how can it be their favourite chocolate if they never ate it?

Generally I find it strange too that he asks them one more favour if he doesn't mean they should die for him, but the other person said chocolate is not lethal, and combined with it being their "favourite chocolate" I'm not fully sure any more he meant to kill them with it.