I havent a clue what you are talking about. If you are talking about her 'sleeping it off' (i.e. sleeping with you to pay her debt), or some other suggestion of illicit activity, there is a word for that---prostitution. And if you are talking about "ruining" her ( presumably, telling her boyfriend, co workers, classmates, etc. to ruin her reputation) then this money you are owed is the least of your worries. I hardly think you could "ruin" anyones life---but knowing that you say you would if you could reflects poorly on YOUR character.