I promised he could come inside you, too
OK, honey! Just hold still and it'll be over in a moment. Once this guy has pushed his huge cock into you and fucked you for awhile, then you'll finally know what a big cock feels like, and we can go back to our normal married life.
I know you say you don't want this, but I've heard you talking to your girlfriends and complaining that I'm not that big. Well, I can't do anything about that, but I can do this for you! So hold on! He's almost all the way in! He's only nine inches long, but very wide.