That one word, whispered so only I could hear, sandwiched between deep, gulping breaths, told me so much. She may as well have said, "It feels so good. Don't stop. I'm going to come."

In reaction, my cock jerked even though it was pressed up against the side of the tub. I was hard as a rock, not only from engaging in a forbidden, secret sex act with my daughter, but also from sharing the most intimate moment we'd ever had while she was at her most vulnerable.

"Ever time, Gabby. Every time I am with you it gets better and better."

She pulled harder at my forearm and her...