How does she tell you these things? I.e., via email, phone call, text, in person...?
Email was my H's kids' mom's preferred method, followed by in person and text. Phone calls basically never happened. Occasionally we would hear things about ourselves from others, and it seemed likely that Mom had talked to those people.
Minimizing your exposure to the wacky things she says could be helpful for reclaiming some peace in your life. Some members have friends or family screen incoming communications and filter out anything not related to the kids.