OK, I am still missing the last question she was trying to avoid. I didn't see a question in your group text.
AS is right though, you continue to be passive-aggressive. And that will work against you in the long run. Remember, sweet as punch until you get through the D and custody proceedings.
Asking if S3 was at her moms or with OM (S3 said himself he was with OM, it just want some damn honesty about where my son is on a given day)
You didn't ask. You implied. In a passive aggressive manner.
Try asking directly. Then maybe you will get a direct answer.