Dp etiquette

It feel the about the same either way

So a week ago my buddy and I went to a party long story short I got invited in a room by a couple being the good friend I am I decided to Invite my buddy. The hot wife of the couple said fine the more the merrier we got in the room small chit chat then we got down to business we passed her around and took turns fucking her now at some point I ended up on my back with her riding me my guy gets on top in dp position witch i thought was fine. I guess I figured he'd slip in her ass but this guy ended up slipping in the pussy with me i was flabbergasted! I kept quiet and tried to enjoy my first dp experience but I felt kinda uncomfortable