She said you did not have to respond, so don't. These types of things from the WAW can lure the LBH into jumping on it like a bug. Then he says waaaaaay too much.
Don't say anything. It does not require a response. Sounds a little like she wants to relieve some guilt she's feeling, but IDK. It could be a temp check, but I think she's saying she wants to clear the air and just move on with life as co-parents to the kids.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!