hubby wants pics "as proof" for his mates and i feel weird about it

so my husband has a small group of close friends from uni who all know we're in the LS. theyre supportive and dont judge but they also dont fully believe some of the stories. now hes asking if he can show them like one tasteful pic from after a meet "just so they know its real". no faces, just like a "post game" selfie of us looking smug. on one hand theyre his ride or die. on the other hand once the image leaves my phone i lose control of it forever and what if one of them shows their partner who doesnt approve... how do you lot draw lines on this stuff. is "proof for close mates" even a real category