You were pleased to see that your wife was wearing the new lingerie that you had bought for her. Obviously, her boyfriend was pleased to see her in it as well. And of course, you don't mind waiting, even though you know it will probably be several hours before they're done, and she might even spend the night there with him while you wait in the car. It's just part of being a good cuckold for the one woman you have ever loved.
[modified from a MiscellaneousCaps pic posted at another site]