I was just in that situation but she didn't show or he told her not to. I'm not sure. He kept asking if I was going to go and I was evasive til right before. Then I rode with his brother and his wife. I would look my very best, have a calm manner, and act like you are really enjoying yourself smile and laugh. You can always let down later. Another thing if you can surround yourself with friends and just visit and do the best job of acting you can do. My H even had to introduce me as his wife twice. To bad she wasn't there.....I think he had to make it up to her and hang out with her yesterday....I know you can do it and stand positive and you know maybe you can enjoy yourself because its him thats going to be the one thats uneasy if he sees you so confident. Wish I was closer I would go with you and be your wing man....That is what my friends and SIL did they thought she might be there so they were always close to me. Talk to you later. Have a good day.