In 1934, while married to her Second husband, Ernest Simpson, Wallis became the mistress of Edward, who was the Prince of Wales.
After he became King, Wallis divorced Simpson to marry him.
<a href="http://www.gettyimages.com/detail/news-photo/mariage-du-duc-de-windsor-edward-viii-avec-la-duchesse-de-news-photo/558648707#mariage-du-duc-de-windsor-edward-viii-avec-la-duchesse-de-windsor-picture-id558648707" target="_blank" rel="noopener">Source</a>
This was a huge scandal. A woman who had two living ex-husbands, to marry the King!
Provoked to choose, he chose Wallis over the Crown, and abdicated in December 1936 to marry “the woman I love”.
This caused a great Scandal.
In 2017, Prince Harry became engaged to an American ‘commoner’, Meghan Markle, a divorced actress and everyone wished them well.
<a href="http://people.com/royals/prince-harry-meghan-markles-official-engagement-photos/" target="_blank" rel="noopener">Source</a>
Times have certainly changed.