premise: It just did n't seem right that Bob & Donna should ignore the one person above all who is responsible for their being together . The more I thought about it , the more annoyed I was with them for being so rude . So I emailed them two days before the party and said their not inviting Margo meant that I was in a delicate situation , that it just did n't seem right and could n't they just invite her to have a cocktail beforehand ? My thinking was they 'd see the light and go ahead and invite her to dinner . Why did they not invite Margo to dinner ?
hypothesis: They thought that she always ate too much at restaurants and so they were anxious to invite her because of her habits