Her reaction to these conversations has never been to get upset, rather she has just seemed bored by them and stops listening.
Any chance that "bored and not listening" may have been "overwhelmed and shut down"?
Honestly, I just chose not to have those discussions with my DD when she was too young to be willing to discuss them. You need a certain amount of brain development to be able to realize that a friendly-looking person is a stranger, or that Mom not knowing where you are is means you're lost. And at 4, my DD did not understand either of those. (I'm not sure she entirely gets them at 7, but she's much more willing to discuss hypotheticals without being upset.)
