My kids knew it was H's decision to go even though we never said, and they knew how devastated I was because they saw my depression.
From what I've seen they will side with H while they are at his house, and then side with me while they are at mine. I don't actually discuss it with them, but DD1 asked me what a divorce was once, so I told her and she said 'Don't ever get a divorce.' Yet apparently when she spoke to her dad, she told him she was glad we split up.
They do whatever they can to gain your love, and I personally wouldn't discuss it either way with S5. If you do reunite, great, but if you DON'T, he will be really upset.
Just say you are friends with mommy and leave it at that. Remember the zero expectation rule? Well, it's good for kids to have zero expectations in this circumstance as they can get just as hurt by backtracking.
