I had gone for higher studies in UK just after my marriage. My father-in-law had loaned 5 lacs via cheque for the expenses of both myself and my wife to help us out when I was a student. There was no loan document - it was just lent informally. There was no coercion and this was in his means. I got a scholarship and returned the money via travelers checks the next year. I don't have proof of the money being returned. My wife is now threatening to file 498a after 9 years of marriage. I do have proof of 15 lacs that I had transferred to her family two years ago, which is thrice the original amount but transferred much later.
How should I deal with this situation? Can I use the latter transfer as a return of the original money since I don't have any proof of the first return? Should I just try to settle?