I would have withdrew the money and then called the bank and said my card was stolen and I don't know who is using it or my account right now.
The bank and police will watch you like a hawk but as long as you don't get flashy with the money and keep it out of any account you are going to be good for awhile
The couple were stupid don't look off a blessing and go crazy because the bank will come back quick about the error
Withdraw $120k out of the ATM?