Yes, it was rather petty....but I think everyone needs to consider the times. Divorce was so frowned upon in the 1930's and to think that the King of England wanted to marry a divorcee with TWO living ex husbands. For all they knew, the marriage would have lasted three to five years, and then she could have moved on to the next husband and then what she be, HRH, Wallis, Mr. Thomas Lester? It was unknown territory.
I totally blame Edward for this...I can appreciate and understand him wanting to marry the women he loved. But it was his country, his people, he should have known that she would have been accepted as his companion, mistress but not his wife. She might have lived in Britain for quite some time but she was not English. Heck, from what I understand...the Scottish and the Irish don't consider themselves to be English (not to offend anyone by the comment). So he was going to marry some American with two living ex husbands?
And from what I understand based upon some books that I have read....Edward and Ernest (2nd husband) had the discussion about the triangle, marriage and divorce without her. I think she would have been content to remain Mrs. Edward Simpson, with the jewels and power that were afforded her being the "mistress" of the King.