Sunny - One little comment here and its only because I see a few similarities here. It's always sounded to me like you trust your H to do the right thing financially. I generally trusted STBX too (probably about 95% of the time) and nothing has really happened to change that.
But - it was sure hammered into my head by every lawyer I spoke with and every person IRL that I consulted who has experience in these matters, that when there is an OW in the mix, that trustworthiness can erode rapidly. I do feel a lot more secure in the knowledge that there is a legal settlement in place.
Your situation is your own- and you're a smart lady - so I'm sure you will make all the right decisions to protect yourself.