Apparently my great great grandad 'sold' his daughter, aged about 13/14 into a marriage to a violent Scotsman (they were from Berkshire -andhe was a generally nasty character by all accounts). He took her to live in some remote part of Scotland where she had two little boys, her husband would beat her and treat her as a servant. At some point after WW1 she met a soldier, fell in love and ran off to America, leaving her children behind. There is no doubt she ended up in America, however I have not been able to find her marriage to the Scotsman.
Another one is that a family member married a gypsy girl, meaning his family disowned him, but having bouhg the marriage certs etc it is quite clear she wasn't, was probably more a case that the family didn't like her!