My wife's sister Gloria is tall and willowy slim, and when she's around my fantasies take over.
Last month we traveled together and shared connecting rooms in a hotel. Gloria's husband Carl is a very nice fellow, but he's not a very robust masculine kind of guy. Carl and I get along fine, but we don't share many interests, and he seems quiet and subdued. Gloria is taller than her husband, and he has, as they say, small hands.
I was putting on my clothes after a shower, and my wife Julia had mentioned to me that Gloria and Carl were trying to conceive. So far they haven't had any luck. Of course, my mind raced as I thought about small Carl trying to fertilize his wife.
"Well," I said to Julia, "maybe Carl just ain't got the potent balls she needs."
"Ha," my wife answered, "you would say something like that. Give 'em a break."
"Oh, I'm sorry," I said. Then a second later, I added, "Or maybe old Mike can't get put it in deep enough to plant his seeds."
"Damn, Bill," my wife said, "you can sure come up with vivid ways to make fun of my poor sister."
I heard giggles from the connecting room. We hadn't noticed that the door between our rooms was partly open. I looked up and saw that Gloria had been listening to us. And, she had been watching me take off my towel and display my cock. I blushed.
"Sorry Gloria," my wife told her sister, "My deadbeat husband was just mouthing off." Then Julia looked at me, with my dangling dick on display, "For heaven's sake, put on some clothes."
Gloria fixed her gaze on my loins while I reached for my suitcase. Our exchange about getting Gloria impregnated and then knowing that she was watching me nude had started priming the pump. My cock was in growth phase, and I was in no hurry to put it away.
Julia had gone in to our bathroom and shut the door while I pretended to sort through my suitcase. Gloria stepped through the door and stood in our room. I picked up a pair of boxers and held them up, "Maybe these," I said out loud. Then I put them down and picked up another pair, "Or do you prefer these?"
I was allowing time for my cock to swell while my wife's sister was looking at me.
"Which do you prefer?" I asked again.
Gloria had walked a little closer and pointed to a silky pair of boxers and said, "These are nice."
I held them up in front of my completely nude body, then I made a big production of stretching them and slowing putting them on. When I pulled them up to my waist, my cock had extended so far that it poked out the pantleg of the boxers a good few inches.