You know you've imagined it.
You sneak into the back of the tanning salon, giggling and tip toeing into the booth together and locking the door.
You're making out like teenagers, hurriedly ripping off each others clothes.
She pushes you back into the chair, slowing teasing you, making sure she has your full "attention". Then straddles you, and boy does she give you a whole new memory of cowgirl action.
You move her to the tanning bed, bending her over the side, the bulbs highlighting her soft skin and silky hair. She moans with pleasure as she feels you behind her, your warm breath on her neck.
You then enter the bed together and embrace. The warm heat of the tanning bed and the excitement of the moment has you both in a fog of ecstasy.
Your hearts are racing, sweat dripping, both getting hotter and hotter until... That moment! And then you are both trying to get your breath, and she has a sly smile beneath the wet skin and messy hair.
You hurry to dress, and you sneak back out, and casually leave the salon, hand in hand, both grinning from ear to ear like naughty little kids that got away with something. Something fantastic. 
So whats your fantasy?
