You and your beautiful young wife are relaxing on the beach. There are very few people here today, so she decided to ditch her top, in a effort to even out her tan. All of a sudden, you see her perk up, and look off into the distance up the beach. You look to see what it is that she is so interested in, and you see a very fit man walking up the beach a ways off.
"Honey, I think you need to go to the store" she says
"Why? did we forget something?"
"Yeah... the uh... sunscreen. I forgot the sunscreen."
So off you go. It's a long, hot walk back to the car. Your feet are burning from the hot sand, but the sooner you get there, the sooner you can get back to your beautiful wife. Maybe even get a little action from her when you return. She was awful horny this morning, but you didn't have time for much besides a quick finger, since you needed to get on the road. So off you go, and in the rear-view you can see that guy chatting with her as you are driving away.
When you return to the beach, this is what you find:
"Uhh, hi sweetie. I got the sunscreen."
"Oh hey! Thanks baby, but I manged to get some."
"From where?"
"This guy came walking along and I noticed he had a bottle with him, so I asked if I could borrow some. He was so nice, he even helped me put it on."
"Well that was generous of him"
"Oh yes, I was sure to thank him extra"
You feel your cock twitch and begin to grow when you notice that her pussy is gaping open, and her bikini bottoms are no where to be found.