My Grandma Lies About Being Pregnant

The day after my baby girl was born, my cousin texted her family group chat and said she had a miscarriage. She then told her mother that she lied about ever being pregnant. A few days ago,My aunt made a comment about it to my grandma and my grandma was very upset. My aunt doesn't even care that she lied and her behavior afterwards was disgusting so I'm leaning more towards she knew all along and was in on it. However, we have all, not 100% sure about my grandma, cut ties with my aunt and cousin.I cannot believe someone would stoop solo as to lie about being pregnant, then miscaring, then having a rainbow baby all for attention.