I think your hubby gets an incredible rush. Knowing all the men who lust after his wife. How many men would love to grope her full tits the way she is in her first pic. Knowing that she is flaunting that body for others to please him. Knowing the taboos she is breaking. Showing off her body, not even bothering to wear her wedding ring as she does. Imagining what other taboos she could be enticed into breaking.
Maybe next year for his birthday can send him a picture of you down on your knees. That pretty face looking up at another man. His hard throbbing cock in the foreground. About to coat that pretty wife with a hot load of creamy cum. Best birthday gift ever!