Son did not need to own the home for 5 years just had to live in it and own it for 2 out of the last 5 years for the exclusion.
And I agree ... talk to a RE attorney to make sure you have your ducks in a row. Your realtor & or closing agent should have also given you some advice for this situation ... the Quit Claim may not have been a good idea or legal if the son cannot sign a contract in any manner.
