Well, your wife is definitely a beauty. She has absolutely nothing to be worried about - I can't imagine any man in his right mind not wanting to fuck the daylights out of her.
If I had the chance, I'd hold her in my arms while I watched you make love to her. When you were done, I would move to make love to her myself, and if I sense that she was comfortable with it, I would make love to her right after you were done. I would want you to hold her while I fucked her as I had done for you. You could see the look on her face, and the sound she makes, as she is entered for the first time by someone other than her husband. The sounds she makes and the looks on her face would indicate her level of enjoyment at the feel of another man's cock inside her. You would be able to tell if she was getting more pleasure, or more pain than she's used to. Perhaps she's not used to a cock this big? Or maybe it reminds her of a previous lover? I would love her for as long as the pleasure lasts, and I would finish by cumming inside her womb, so that the semen from two different men mixes inside her and competes for the chance to fertilize her eggs. It might be nice if we could maybe both make love to her and if we could both cum inside her one right after the other, for this very reason. This is also a fantasy of mine.
Anyway, please tell your lovely wife that from the pictures I see, she is a knockout. Very beautiful.