I thought she cheated. Ok, so maybe she is just asking and in no way trying to be rude. Sometimes we just blurt out questions without thinking. You could go with the pat answer..."We grew apart".
She might be trying to see if you will belittle your ex, see if you are bitter and so yes, she could be testing you. Don't write her off yet.
Kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory