Thomas Sharp Hope: My Emigrant Ancestor

Last time I wrote about the Beales of  Biddenden.  My Beale ancestor was not a Richard, but John Beale, the ninth of Rich Richard's ten children.  Though not as wayward as his brother Crusty Richard, John also provided his share of headaches to the Beales.  John's mother's (Frances Beale, nee Witherden) letters are kept by the Biddenden History Society, and according to a Beale cousin who has seen them, she was in frequent dismay at John's behaviour, which included gambling and sending his washing back to River Hall.  Frances also expressed disapproval at John's choice of wife, Elizabeth Hope, so much so that she apparently forbade the marriage.  John seems to have paid lip service only to her wishes and had four children with Elizabeth out of wedlock, giving them the surname "Beale Hope", before finally marrying her in 1850, four years before his mother's death but long after his father's.  They went on to have another ten children after the wedding! Why did the Beales disapprove of Elizabeth so much?