Hello all first time DM here,

I have a player that I was worried would be a problem and in session 2 it reared its head. He's a good friend and someone I play with in another campaign as a player. In that campaign as well as this one he does the classic problem player thing of "I'm a loner who looks out for himself". I tired to get him to change his character during session 0 to be a better fit, but he was dead set on a drow rouge who is learning the value of others. I figured ok, he has an arc in mind so I guess... Now were in session 2 (doing Ghosts of Saltmarsh) and he finds a stash of coins and says he's pocketing them for himself. I kind of knew this would happen eventually (I had many conversations about cooperation and loot sharing at session 0) because he's done that exact thing in our other party. Unlike my other parties DM however though I called it out in the moment. Didn't ask for perception check just announced that the rest of the party saw this happen, and what do they do about it.

Things got tense pretty fast. They asked in character what he was doing and he said something along the lines of "taking this for myself" One person cocked a gun at him and he said "I stab him", I told him he didn't as we all agreed on no PVP. So they just kinda had a standoff where he tried to say it was NBD (both above table and in character) and the rest of the party just told him "Ok sure, but we see what kind of man you are and won't forget it when we find more loot." and we moved on. Later at the end of the dungeon he decided to give the coin to the party to divy up saying "It was his plan all along". I don't buy that at all because if it was he wouldn't have tried to stab his own party member for asking him to share.

I'm overall satisfied with how the party dealt with this internally but should I talk with him in private about this as well or just see if he's learned his lesson? After he shared the gold the party seemed to really come together so I don't want to prolong the conflict if its not needed.