This is where you took the bait. She asked about the kids. You know they are OK because they are with you. Then you asked her 'what's wrong'. You took the bait. Maybe a response to shut her down could be - "the kids are fine, we're having fun. Thanks for checking in".
Why did you ask if something happened? If it's her personal life, don't ask. You don't have it in you to continue the bullchit she's tossed you over the last 2 years, don't encourage it. If you were curious, then ask yourself, why am I curious about her life?
That's what I'm talking about. You would have saved a lot of brain power. If you think by encouraging further conversation you'll get more insight about what she's thinking, she's proved over and over again that she will blindside you and she will lie. So, really, outside of conversations about your kids, nothing else matters.
