Martha
Oh, we broke off the engagement when he decided the Delaney bint was prettier at some party at the Estate. Don't worry, I got back at him by running off with Jimmy Stone. As for the pink wedding, well... Alternate Universe. The Seal sent me off to a world where I told the Doctor no and didn't go with him. I get there and Mum's planning my wedding in ridiculous amounts of pink. By the time I got sent back, everything was TARDIS blue and the Doctor had been poisoned for some foolish decision he made, the git.
...on second thought, never mind. I already lost you to the bloody Seal once, you know. Not doing it again.