Your wife agreed to try something new. She knows your friend Dave and was okay with trying a mfm 3some. This will be her first time with 2 men at once. So you had to prep her a little and tell her what's going to happen. You have her suck your cock first to get her over the initial shyness of being with 2 naked me. Then you give her some instructions.
"Okay baby, this is how you're going to suck Dave's cock. He's going to fuck your mouth like this. That's it, just like that. Try and take it all. Okay now his turn".
"Okay baby, this is how you're going to suck Dave's cock. He's going to fuck your mouth like this. That's it, just like that. Try and take it all. Okay now his turn".