Hey Gregr , you mention , ask what should you say. suggestion say what you feel does it excite you knowing thinking about him cumming? You have thought about it what makes you most excited ? I personally love to have my wife take a load so when he pulls out there is cum dripping out down her ass crack , love that look ! If you want to see that them say fill her up with your load You want to see him cum on her face her breast , speak up tell him , don't be shy ! This experience is for the both of you , enjoy it to the fullest