Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
The photographer sounds like a douche. Go no contact with him and get into counseling with your husband.
(I'm a former CS.)
This wasn't even a romantic affair to be honest, it was a confidence scam. All he did was set up a mouse trap, set the bait, and walked right into it.
Get into counseling ASAP as there appears to be a lot of work to do.