In 1860, The Times noted that Rawdon-Hastings was one of only three to hold peerages in all three Kingdoms of England, Scotland, and Ireland (as Earl of Moira).

However, during their engagement Florence had secretly fallen in love with Henry Rawdon-Hastings, 4th Marquess of Hastings.

[6] The marriage created a huge scandal as the bride had been engaged and was to be married the same day to his best friend, Henry Chaplin.

[4][7] After the wedding, a reception was held in St James' Place before the newly married couple set off for their honeymoon at Donington Hall, Leicestershire while the scandal died down.

[1] After his death, his widow, Lady Florence, Marchioness of Hastings, would marry Sir George Chetwynd, 4th Baronet, on 9 July 1870.