Out of curiosity, did you do a lot of this last-minute stuff during the day, while she’s at work? If so, I could see how she might not realize how much work was involved. I seriously doubt Dr.J has any idea how much time I spend cleaning the house every week. Hell, a lot of time I don’t realize how time-consuming it’s going to be until I get started, and I’m the one that does it. Even if this was the case, though, and she thought you really hadn’t done all that much, I simply can’t imagine not thanking you for the work you had done. Even a little bit of work is that much less work she has to do for the party she wanted to throw and ought to be appreciated.
This, I think, is a bigger issue than any of the others you’ve outlined. Appreciating one another, and making that appreciation known, is a big honkin’ chunk of a successful relationship. Relationships where one feels one’s contributions are ignored breed unhappiness, anger, and resentment. Nothing kills love faster than festering resentment. Nothing. So it worries me that you guys don’t seem to appreciate each other’s contributions. Yes, I included you in that comment. Why? Well, because you don’t seem to appreciate the things she has done. In your OP, you say she did nothing but prepare one course and hog all the credit for the party. In later posts, you say she did the bulk of the shopping, the menu planning, etc. You don’t seem to appreciate her contributions any more than she does yours.
In that light, I have to wonder if she felt that your relative contributions balanced out. She did the major planning, the bulk of the shopping, part of the cooking and apparently most of the hostessing. You did the bulk of the cleaning, the last-minute shopping, and part of the cooking. Given the extent of the cleaning, this seems to still be a bit lopsided, but it’s not exactly her sitting on her ass and eating bonbons while you slave in the salt mines for her entertainment, as your OP would imply.
I also have to wonder if there are, ahem, other tensions creeping into this issue. All that money and living arrangement stuff, the stuff about her leaving her other relationship…I’m not sure what all that has to do with the issue at hand, so I’m left wondering why all that was included in the OP. I would have to ask myself if this is really, honestly, all about the lack of appreciation, or if there’s something deeper going on.