They had arrived later than usual, for their occasional foray to the Health Club. Most of the time, they worked out at home, in private, usually nude.
It started out a "regular" exercise program, until Lori walked in on her brother one day. The basement room had been set up like a small gym, a few free weights, a bicycle, treadmill, and an abdominal workout chair.
Ryan had gone down earlier, when no one else was home. He had just come home from work, and decided to work out, before he took his shower. He had stripped off his work clothes, and started on the bike. As he was moving to the Ab-chair, Lori walked in.
They had `experimented' together in their late teens, Lori was 19, Ryan was21, at the time. They "fit" together well, but had few opportunities to share with each other in the past two years. Lori was at college, Ryan in the Military.
"Hey, Big Brother! Looking `buff' there!" she called out.
"Hey, yourself! When did you get home?" he replied, as he started to twist his torso on the chair.
"Late last night, I stayed at Joanne's house."
"I'm almost through, then we'll talk. Okay?"
"Don't hurry for me." She commented. "I think I'll join you."
With that, Lori started to peel off her T-shirt. The slender strap of a sports bra did little to conceal her C-cup breasts, and the Hi-cut panties under her shorts emphasized her soft bottom and smooth thighs.
She started to jog on the treadmill, looking straight at her brother as he bent and twisted the Ab-chair. She stared at his strong thighs, and the substantial flesh between them. Even soft, his penis was impressive with its thickness. Lori felt herself getting wet between her own thighs as she remembered how good it felt to have him deep inside her.
Ryan watched his `little' sister start running on the belt, her not so little breasts bouncing in the minimal restraint. He could see her nipples rising from the friction. Ryan also saw the dark spot growing larger at her mound. His mind went back to the last time they shared love, and how sweet her kitty tasted when he kissed on it.
Ryan's cock was growing while his thoughts turned from then to now. He stopped the set he was doing, and slowly moved behind his sister. The weight bench was on the other side of the room. Ryan lay back on it and took up the bar at its head.
Lori slowed her running to watch his arms flex, and the pulsing pole at his belly. She slid away from the treadmill, to "spot" for her brother. He could smell the scent of her arousal, mixed with sweat as her crotch stopped right above his head. She "helped" him with the bar of weights and leaned farther over him than she needed to.
Ryan let go of the bar, and reached around Lori to take her butt in his hands. He pulled her down to his face, and kissed her dripping kitty through the soaking wet cloth.
"OOOHH! Ryan!!" she moaned. Lori pressed her vulva closer to his mouth, and felt his stiffened tongue probe her crevice.
