Should I have even been suprised?

My new sister in law has a penchant for forgetting my wonderful celiac disease which is fine as not everyone gets it but when you make reservations for dinner for such things leaving out helpful hints such as it's a byob is just inexcusable to me.  But this she does all the time.  Maybe because I'm older and I expect certain things just because to me they are normal, usual things you do for friends and family.  This was my lovely scenario last evening.  We went to her 2nd birthday celebration (why she needed 2 I don't know, it wasn't a big bday) at a hibachi restaurant in the burbs. We had been at her first on Saturday at some crazy place on the river in the sticks with what they called a great view of far away Philly and the Philly airport which her brother didn't even want to go to that I had to make him go after spending the day looking at houses.  So we get to the restaurant where first she introduces us as this is my brother, B and um Library....Okay what about his wife or my sister in law?  We just got married a month and a half ago. Then she has saved him a seat next to her single, 25 year old, skinny friend. Nice one. Then offers us beer with a OH I forgot!  Yeah I know you forgot, you always forget, last year at your bday you forgot that it was a byob also plus it was an Italian restaurant where they put flour in everything. Then xmas morning you also forgot and made all kinds of food that I could not eat and offered me regular pancakes. Luckily husband had snuck along a box of gluten free pancake mix.  Then usually when we make the dinner plans you complain because it's at some crazy place in the city which by the way is easier to get to than your bumf*ck burb places or because the food is "weird."  To which the food isn't weird, it's just not chicken nuggets or pasta or whatever.  So I told husband I was walking across the parking lot to the lovely Wegmans for a bottle of wine.  Husband countered with a do you really need wine?  Um do you really want me not to yell at you when we drive home husband? Yeah I think not.  So I get my wine, barely drink any of it because actually it was just the point of it all. And I'm quite sure now his mom, grandma, dad, and every other relative now knows the new daughter in law, library is a huge brat.  Not that maybe you didn't teach your own kid manners....Because I don't know, when I invite family and friends to a byob I make sure to tell them it's a byob, hell I even send them a link to the menu and then husband and I make sure to take along various beer, wine, and other booze for those who don't want beer or wine so that everyone is covered and comfortable.
I have learned one thing from this all. when going to dinner with my sister in law, always bring a bottle of wine in my purse because if I don't need it to drink at the table, I may need to take it to the ladies room with me for drinks in between the meal....