"So how far do you want me to go with him?" my wife asked.
I exhaled deeply. "I don't know," I said. "I want you to do what you want to do."
"So if I, um, sucked him, that would be okay?" she asked.
"Would you like that?"
"Yes, I suppose so." I stammered
"And if, after I suck him, if he fucks me? How about that?"
She stroked my penis and I started to orgasm immediately. She grinned and leaned down to kiss me and I finished, shuddering.