They'd need to see evidence and I don't have a pic of them together.
Then you've answered your own question.
Agree, warn your friend.
Save the "lovey-dovey" messages, if you come up with any. The timing of that play ("He's playing you; he's still intimate with his wife") is for another day -- not in this phase.
You can't control all the lies. To the KEY players -- other spouse, parents, etc. -- you can (and should) continue to periodically re-expose, as you get add'l pieces of irrefutable intel.
