You love watching your wife get dressed for a date. This is what you wanted for her, to enjoy other men and now she's waiting with you for his arrival to pick her up. And that anxious angst that you now experience is so obvious when she admits she may not be home until the morning. How you react to that is amusing. And she enjoys that too.
It is hard for some people to grasp not having access to your own wife's pussy. The fact is, it was never that great having you penetrate her in the first place. That is why she quickly cuckolded you when you presented her with the opportunity. Now that she has a boyfriend, she gets regularly fucked by him. Of course it is better sex, that is what you and your wife sought out. You still are her best-friend, you have your house, kids and life together. You cuddle and kiss and are intimate. Her pussy now is just for other men only and that is arousing for both of you.
heeeey ;) xx