That kinda brings traumatic memories about playing Diplomacy... the everlasting panic and suspicion that everyone is coming for you.
"What?? You are moving on me, right? you broke a deal with Russia, didn't you? DIDN'T YOU?"
"Nah bro, you are totally receiving fake Intel, I told you, we are moving together against Russia"
"But then why did you moved to X instead of Z? You are totally going to stab me in the back"
"No way bro, we are hommies. I did that because [insert lame excuse]. Don't worry"
"Yep, I am f*cked. Good luck man, no bad blood. This is diplomacy after all"... if you want a more realistic end to this, it usually goes "screw you. I am never paying for lunch again. We are done"
This kind of conversation happens way too often in a Diplomacy game.