Those are some mesmerizing boobs. I don't know how he does not fondle and grope them until he empties his ballsack in her mouth. That's definitely how I would have the most fun with that pretty piece of meat.
It's always so wonderful to see how eager a wife/gf is to suck off or fuck someone else. It helps drive home the fact that permanent chastity is a great idea, especially if you get to witness this.