[That gets her a glare from him.] So far, this is only a soft threat. He has not outright said that they will be harmed in any way, or even interfered with. It is far more likely that whatever happens, he will claim there was no explicit threat. If anything, it would be more demoralizing, for someone to kill because they thought they heard a threat and then learn there was no real danger.

[He knows a bit about lies and half-truths himself, after all.]