Dever Seducing Sister-in-law

In the bathroom I showed her where to get towels, hang her clothes, and offered to fill the jacuzzi tub also. A few weeks ago, with all of the odds stacked against me, I hit one out of the ballpark in the pussy department. Darlene felt so good naked and wrapped in my arms. She seemed to know that a guy will excuse forward behavior when it’s directed at his dick. I bet that Mr. Darlene felt so good naked and wrapped in my arms. I was eating at a table by myself and, as Darlene refilled my coffee, I said, “Hey, instead of the normal tip, I’d be willing to give you a back massage better than a super spa treatment, guaranteed to do the job on your back.”
To my shock and surprise she relied simply, “Oh God, you’re on, how soon can you do it?”
“When do you get off?” I replied, fully expecting that she was putting me on.