You/your wife owe nothing as it was a gift. Sounds like they were advised about the tax ramifications on their end, as the 14K is the gift limit/exclusion and does not require them to report the gift to the IRS. Any taxes on a gift are due from the giver's end basically, but this amount is not enough to cause them to have to pay anything.For further reading:https://www.irs.gov/businesses/small-businesses-self-employed/frequently-asked-questions-on-gift-taxes