I am so sorry that W has made these statements. Personally, I would say to tread lightly here. DO NOT TELL her that you are going to see a L. Begin to write down the things you do with the kids. DO NOT speak to the kids about this. This is really between you and her. In my sitch I just found out this morning that W is NOT willing to give me the kids 50% of the time - so I will need to fight this.
Your W may have made these statement because she is hurt and scared. As hard as that is to believe right now, she really is scared and hurt. She probably refuses to face her own issues and uses the comfort of OM to do this so you need to understand that you are NOT to blame for all of this. Do you have some fault or role in this - YES. It does take two to tango.
As for the kids, I would set up a consulation with an L to find out what YOU need to do to position yourself to have 50/50 with the kids. You may not need to file, you may not need to do anything but I do suggest that you find out what your rights are. Pay close attention to what the L tells you.
As hard as this is...as hard as it will be speaking to an L - you are still in control of YOU. You still decide what is right for YOU and your kids. No one here can tell what the right answer is - only you what you need to do. As I said earlier just make sure that you do not have regrets. I believe that you will do what is right.
God Bless, Eric
"The difficulties of Life are intended to make us BETTER,not bitter". "Fear is a prison, where you are the jailer. FREE YOURSELF!" "Life is usually all about how you handle Plan B." - Jack3Beans