Penny agrees to a tan

"He's right, darling," Christie ribs Penny a bit, "you do need to even those freckles out..."

"I'm not so sure about that..." Penny hesitates, looking down at the ground.

"Didn't you just make my brother cum?" your sister raises a skeptical glance at her as you feel it chubbing up again.

"Yeah, but that was your idea," Penny rubs the back of her neck, "and besides, that was indoors, in the comfort of your home. I don't know if it's decent just walking around outside in the altogether..."

Penny looks at you, seeing your blush as your avoid eye contact, and looks down at your abs... and your inflated sausage.

"Alright, fine," Penny concedes as she addresses you directly, "I'm just five minutes away, and we can tan in my back garden together."

You are now at full mast as Penny swipes her cardigan off and pulls down her skirt. Her shirt is next to go unbuttoned and shrugged off, and you notice her plain white underwear and black stockings as she takes her shoes and socks off. Next comes her bra and then finally her knickers, as she swipes them off and looks once again at your member, giggling as it almost bursts at the seams.

"Hope it doesn't get sunburnt!" she just chuckles at your shiny head as you struggle to say anything.

"Right, then," she gathers up her clothes and puts them in her purse, "I guess I'm off with Mr. Vampire, here," she grabs your hand and leads you out of the yard, "don't follow up."

"Ta ta!" your sister bids you two farewell.

"He's still gobsmacked after all this time!" Christie points at your face, still slack-jawed at the sight of the nude Penny. "Don't forget to take lots of pictures..."

"Well, then," Penny turns to you as you leave the garden and head out into the street, "this is my first time doing this. I hope we don't get in trouble..." she looks down and sees your throbbing erection, "well, I certainly hope you don't get in trouble..."

You two continue walking down the road, holding hands as your bare feet slap on the pavement. This is your dream come true, walking down the road with your crush Penny towards her house. You try to process your complex of emotions at the fact that both of you are stark raving naked. She looks at you, making eye contact and making a light smile. You notice how soft and friendly her facial expressions are in this moment of shared vulnerability.

"I guess we'll need sunscreen and tea when we get to my house," she tries to elicit conversation from you, as much as that seems like drawing milk from a stone at this point.