It sounds like she understands what you need - if she were to think you didn't need therapy, it would be in context of focusing on your STBX, rather than on you. She is focusing on you.
IC is a great place to process, but it's also a great place to develop realistic and healthy plans for dealing with very immediate issues that arise - like how to ensure that this is a smooth and healthy transition for your kids.
Are they (the kids) in IC as well? Have you thought about looking for one for them if not?