When my younger cousin who I'm very close to was getting married I was supposed to be a groomsmen but, my unit was deploying so my.cousin had the wedding planned so that I could take leave and go before deploying. My grandmother (who Is a not very nice person) was moving to Germany from the US so she convinced my cousin to change her wedding date to a date I couldn't take leave on so that she could be part of the wedding before she moved. When I complained my grandma told me " when you decide to leave home you miss important events"
Flash forward 5 years to when I was getting married. My grandma was back from Germany for 6 months. Me and my wife originally had our wedding planned for a date 2 weeks before grandma left then I realized that I had to get back at her. So we rescheduled for 2 days after she left. When she complained I told her " when you decide to leave home you miss important events"
I'd call it ironic that she said that after getting the date changed so she could leave home, but she knew exactly what she was doing and wanted to rub it in your face. So good call on your revenge.