Interesting how what is fun can evolve. As a younger man I just ached to see her interact with woman in any way. At this point her getting off by being fucked by a guy that she gets off on is number one. The scenerio you have with your wife getting off on the young stud, and the young stud getting used by you! Bravo! Trying to decide which position would be more fun, yours or the young stud getting the chance to fuck a beautiful woman and enjoy getting fucked by a good looking woman or you enjoying your wife getting off while getting to fuck that tight ass. Tough choice.