Overthinking it won't help you. However, it is better that than pushing her to talk or make any kind of decisions. Don't take her temperature to find out where she is or anything. Keep quiet. Let her bring it up when she is ready. If that's a year from now.....so be it.
Use the time wisely, to work on yourself and help your son.
A word of caution when talking with her about how your son is doing, it can come across as blame. Even if you don't mean it that way, her gulit may take it that way and it can push them away.
