Silver King, I understand your perception, because encountering a thread like this is like hearing only half of a telephone conversation. You walk into the room and another family member is obviously having a conversation of some importance, but, no matter how many times you say, "What is it? What is it?" they ignore you. So, you have to wait until they get off the phone and hope that they will tell you what the other half of the conversation was.
Just like that hypothetical phone conversation, though, the family member in the room with you is under no obligation to share any part of it. Just Me's words belong to Just Me. If she chooses to delete or edit her posts, that is her choice.