She is mortified

“What on earth are you talking about. I don’t think you need to use foul language like that around me.”

“I saw you last night over in the Joe’s backyard. He was doing you from behind, pounding your pussy with his big cock. He shot his wad in your face after you sucked his cock. Is it starting to come back to you now?”

His mother looked at him the embarrassment clear on her face. “You saw us?”

“Yes, Grace and I were coming back from taking Mrs. Taggert home and there you were. Fucking the man you think is a giant asshole. How do you explain that?”

“I can’t really,” she said in a low voice. “I guess I like men who are large, well you know what I mean, and Joe is oversized. We just do it sometimes. It doesn’t really mean anything. You’re not going to tell your father, are you?”

Jack thought for a moment. Joe does he because he wants to dominate everyone around him. He dominates dad, now he dominates dad’s wife.