I have been with DH just over 5 years. We are married. I have been called his ex wife's name on multiple occasions. By his sister a few times (including on our wedding day..nice) and twice now by his parents. Would I be a complete cow to start calling them by the wrong name? Our names aren't similar. I look nothing like her. And the DSC are sat right there so I think its insulting to everyone involved frankly.