Oh grief, yes. My D29 would've loved to have had somewhere else to go other than to babysit our little ones when she was a teen (she is 7 yrs older than the twins and 12 yrs older than the youngest), but she had nowhere to run. Hahaha!
Well, who knows how they will react and how things will turn out. The important thing is that you, ACJ, be a safe place for your kids to fall, and to move on with your life. It surely is too short to muck about with worrying about things you have no control over (even your children since they are old enough now to choose where they want to live and I beg you to be okay with it before the sitch eats you up). It's no reflection on you as a mother, but their fear of losing their father. They know you are there, but not so sure about their dad so they cling (and, of course, who knows what he is saying to them to get them to do so). But, that is not your concern ---- take control of your own life and take it one day at a time ---- that is all we have really. Yesterday is gone --- no going back. Tomorrow is yet to be, so you can only influence it to a degree (make plans, appointments, etc.), but there are so many variables that it is impossible to know how it will turn out. Today we can work with.
Take care of yourself.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim