My brother got engaged, and then had his fiancee call off the engagement, right before my fiance and I were sending out our Save the Dates. Per my brother's request (he was hoping his girl would change her mind and get back together), I went ahead and sent her a Save the Date. It's now been a few months and my brother and this girl are not getting back together. She has a new bf and my brother is seeing a new girl, as well. My question is: since I sent her a Save the Date, do I have to invite her to the wedding? Should I ask my brother how he would feel about it? I don't want any awkwardness at the wedding or reception!