wishing, The niece was most likely posting quite a number of photos out on Facebook and you expect people to take sides in what is going on between you and your h. Don't rule her out as a friend, but you will need to be cautious in what you discuss w/her in the future.
BTW, all of it bothers you right now...let it go. It's just one day in the many ahead.
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.