Time for the oil....

Cindi couldn't take her eyes off her big brother and the massive cock which hung between his powerful legs. She swallowed hard as she realized that he didn't have any tan lines on his buff body. Adam's cock was well over a foot long and as thick as her own forearm and it wasn't even fully hard yet.

"Damn bro you have really grown up." she told him unable to take her eyes away from the dangling package just a few feet away from her, "You look great."

"Thanks Cin you look pretty damn good yourself." Adam answered as he looked over her firm 34DD breasts, toned tummy and completley shaved slit directly in front of him, "Have you been working out?"

"A bit." she said licking her lips as she watched a drop of precum leaking from the tip of Adam's bulbous cockhead.

"Make a muscle for me sis." Adam directed.

Cindi did as she was told and flexed her arm showing her brother her small but well defined bicep.

"Very nice. Now turn around and strike a pose for me." he said.

Cindi pivoted on her platform heels and stuck one of her legs out slightly while flexing both of her arms. She looked beter than any stripper or fitness model the horny 20 year old had ever seen.

"Wow! Very impressive." Adam said as he admired her shapely curves and nice caboose.

"Enough." Cindi stated as she dropped her arms and turned towards Adam saying, "Lets put some oil on and get tanning." She noticed that his cock seemed to be even bigger.

"Ok." her brother said handing her the bottle of tanning oil back, "But this time you do me first."

Cindi nodded as she walked towards her big brother, opening the bottle as he turned so that she could do his back.

"This has to be betwen us. OK?" she said as if to remind Adam of their little secret.

"Sure...sure." he said as he placed his hands on his hips and Cindi began to pour the oil onto his broad shoulders.

As soon as the oil began to run down his back she quickly put the bottle down and began massaging the slick oil all over her brother's shoulders, neck and back. Stopping just above his ass, Cindi moved her hands back over to his arms and began massaging the oil into them.

Adam was in heaven as he felt Cindi's talented fingers work the oil onto his back and arms.

Cindi was also enjoying the feeling her hands were experiencing as they moved over her brother's incredible body. Glancing down at his bare ass Cindi poured some oil onto her hands and began to rub his buff butt.

"Oh yeah that feels good sis." he told her as she allowed the oil to run down his ass crack before running her fingers along it.

Still standing behind him Cindi slowly moved her hand between Adam's legs and gently touched the thick pouch holding his massive balls.

"Oh my God." Cindi said out loud as she felt Adam's scrotum for the first time.

"Aaaa." Adam moaned at his sister's touch as she continued applying the oil to the backs of his legs. He was doing everything he could to prolong this pleasure and not cum.

Finally Cindi said, "Turn around bro and let me get your front."

Adam quickly spun around to face Cindi and, as he did this, his enormous cock accidently touched Cindi's hip for a brief moment.

"Oh!" she squealed as she looked down at the throbing shaft pointing menacingly towards her. She knew if it was any one other than her brother she'd be in a very dangerous position right now.

"Sorry." Adam said as he looked over Cindi's naked body standing very close to him.

Cindi contiued rubbing the oil all over Adam's muscular chest and tummy as they both enjoyed the feelings they were each getting.

Eventually the only part of Adam's body she hadn't oiled up yet was the rigid cock pointing out from between his legs.

Cindi poured some more oil into her hands as she looked at her brother's cock.

Does she 'oil' his cock up or does he oil her?