You can't help but to love dogs and their enthusiasm for things like that. I am sure it makes you happy to see her get so excited. I ask my lab do you want to go for a ride and he just about jumps out of his skin with delight. I put him in the truck and put the window down so he can stick his head out and he is in heaven.
Want to know who loves you more, your dog or your wife? Lock them both in the trunk of your car, come back in a half hour and see who is happy to see you....sorry it just came to mind.