I'm sorry your MIL was a PIA. Ignore her. Sooner or later when she realizes that she's not getting the reaction she wants, she'll stop this childish behavior. She's got some serious issues and you do not need to be subjected to them.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
