@maxdancona,
The OP didn’t say she was worried. She said she was unsettled.
I would indeed be unsettled as well, and would be unsettled, disgusted, and angry is the situation was reversed and a girl friend of mine sent me naked pics of her boyfriend.
I wonder what the husband thinks of this. Although it does seem he kept the pictures.
If I were in the OP’s position I would have a calm discussion with my husband about the entire situation. I’d want to know what his thoughts and feelings were about a friend disrespectfully both sending photos of someone he professes pride in, if the GF knows about this, his feelings toward getting theses pics, and much more.
I don’t automatically buy this “I’m proud of her” stuff. If he was so proud why wasn’t he cc’ing the GF when he’s sending out the pics so she can see how he likes to spread the joy?
As far as worried. I’d be more worried about the fact someone is perhaps unknown to them having a picture of this private nature sent out.