DP and I have been invited to a meal to celebrate DPs dad getting married in January. They're having a meal because the wedding was in Austria and obviously not everyone could go. I wasn't sure what to wear as it's not an actual wedding but it feels more important than you're regular sit down meal.
I messaged DPs sister to find out what she was wearing and she's going in a white dress; this has prompted a discussion between DP and I as to whether this is appropriate. Basically I would just like to know what other people think