It's not likely anyone is going to believe that unbelievable excuse. It's your problem that you lent the account to someone, your responsibility for whatever happened. There's also no way to prove you did it, and frankly I don't buy it anyway. This sounds just like those "I got hacked!" alibis that scam exchanges and others have used to cover up their misdeeds.
this account's worth too much to me.
Then you ought to recognize how stupid it was to let someone use it, especially someone with the propensity to scam.