Christmas as the in-laws

Have your in-laws asked how Santa works or just assumed you are going to follow how they did Christmas and Santa when their son was child. in my family and the way I have always wanted to do it, Santa brings a set of presents only from him to the house where you are sleeping and only to kids. My in-laws tonight have told me 3yr old, Santa will be delivering presents to their house for her. I'm annoyed at this is this isn't how I want her to think Santa works, and I don't thinks it's as magical. Apparently all presents are from Santa too even if they have name from other people, which I also don't think is right. I'm now dreading Christmas afternoon with them, as I think the way they have said tonight is going to ruin the magic of Christmas morning