My husband and I invited my sister and his two daughters to our home for Christmas Eve. Somehow, she interpreted this to include his boyfriend and his three daughters. We don`t have space enough for so many people at home. I know if I tell her something about her boyfriend, she`ll feel upset. What is worse, I think if I tell her something about this, she can decide not to spend the Christmas Eve with us. I don`t know what I can do. 

A few years ago, I still remember our last Christmas dinner all together. It was a crazy dinner. I was cooking all day my sister`s prefer dish, tuna steak tartar. I bought one of the most red wines at the market. Everything was perfect for that night. I was very excited because It was to be the first time that we spent Christmas Eve all together. Unfortunality, It was a bad Christmas Eve. One of my sister`s husband daughters was allergic to tuna. So, we can imagine how the dinner finished. Immediately, we had to go to the closer Hospital in the town, and we had to spend the rest of the Christmas Eve there. 

In conclusion, I know it was an accident that last time. I also know that I musn`t cook tuna steak tartar again. But I`m not sure if It will be a good idea to spend Christmas Eve together again.