You can then make a firm seal with your lips on his shaft below the cockhead. Then stroke the shaft up and down. Don't touch his head with you lips. Keep up the firm pressure with your lips. He will give you a nice complete load in your mouth. Don't stop stroking. Leave your lips around the shaft. Keep doing it until he gives it all to you. That's the way to give a beautiful blow job until completion. Women should take note. It's only the head that is sensitive.
Now you are your wifes best cuck you can be. If you position yourself to be more of a friend to the boyfriend and your wife. You will not lose your wife. You will be a submissive still but confident Cuck. You will never be afraid to leave them to experiment by themselves.