Peter smiled as he looked at the two sisters. They didn't look like twins, but they certainly couldn't deny they were sisters. They both had their mother's good looks, small nose, and beautiful eyes. Carol's breasts were slightly smaller than Susan's, but probably still a small C. Carol was two years younger, but like Susan, she looked younger than her age. She'd been taking dancing lessons since she was a little kid, and she still took classes. Her body didn't have an ounce of fat.
The sisters sat in the sun, chatting and laughing like two girls in high school. Peter sat in the shade, enjoying watching his wife look so happy as she caught up with her sister. After a little while, Carol turned to Peter and said, "C'mon, Peter. It's time you earned your keep. You know we only let you into the family because you give such good back rubs." With that, she lowered her lounger into a flat position and rolled onto her stomach. Peter smiled as he got up and walked over to her. He sat on the edge of her lounger next to her, leaned down, put one hand on each of her shoulders and dug his thumbs into her shoulder blades.
"Oh, god, that feels good!" Carol moaned. Peter slowly moved his hands down Carol's back, pressing his thumbs into her muscles. When he got to her lower back, he rubbed his thumbs just above her bikini bottom and pressed hard on both sides of her spine. "Oh, yes", she moaned. "Hey, Susan. You know how Peter says you only married him because of his back rubs? If that really was the only reason, I think you still made a good decision."
"Yeah", Peter agreed, "that's about the only thing about me she likes."
He continued moving up and down her back, massaging her muscles. He loved giving Carol backrubs. First, she was always very appreciative. Second, he liked Carol, and he liked making her feel good. And third, although he knew this probably was bad, he liked running his hands across her body. Her body was in great shape, and he'd be lying to himself if he said he never fantasized about her. But most important of those was the fact that he liked making her feel good. At least that's what he told himself.
At one point, he started rubbing her neck and then massaged her scalp. He liked it when he got a scalp rub, so he used to assume everyone did. But his wife didn't. Whenever he tried rubbing her head, she'd just say no. But Carol liked it. She moaned when he rubbed her scalp and then laughed as she said, "hey, Susan. Your husband gives good head."
"Hear that, Susan?" Peter said, "I TOLD you I give good head!"
Susan rolled her eyes and said, "just keep telling yourself that." All three of them laughed.
He rubbed her shoulders hard and pressed deeply into the knots in her muscles. Carol responded with moaning appreciation. He moved down her back again and once more pressed his thumbs low on her back. This time, his thumbs went just slightly under her bikini bottoms, moving from the middle of her back to the sides. He didn't do it intentionally; his thumbs just slid down along her spine and ended up just under her bathing suit.
Carol felt Peter's thumbs slide under her bikini, and she smiled to herself. She liked the thought of his hands so close to her ass. Carol always had a thing for Peter -- ever since the first time Susan brought him home. She was in high school, but she was old enough to think of him sexually. It's not like she was going to try to steal her sister's boyfriend; she loved her sister and would never do anything to hurt her. But......... she definitely had a bit of a crush on him.
Now that his hands were underneath her bathing suit -- even if only by a half inch -- she suddenly had naughty thoughts running through her head. In fact, she started breathing just a little heavier and felt herself getting a little wet. If her sister hadn't been there, she definitely would have asked him to rub her glute muscles. She liked it when her massage therapist massaged her glutes, and she wouldn't object if Peter did it now. But she knew that wasn't the primary reason she was thinking about his hands rubbing her ass. She felt bad that she was having thoughts like this about Peter while he was just giving her a backrub and wasn't thinking anything sexual.
She was wrong. Peter certainly did realize where his thumbs ended up. For a very brief moment he had a picture in his mind of what it would be like to slide his entire hand under her bathing suit and caress her butt. But of course, he wasn't going to do that; not only would it be wrong and probably piss the crap out of Carol, but his wife was lying less than 10 feet from the two of them. So he slid his hands back up her back and continued rubbing and loosening knots in Carol's muscles. After 15 minutes, he said, "Okay, Carol, that's it for now. I don't want to spoil you."
"Mmmmmm", said Carol. "Go ahead and spoil me. If you and Susan ever split up, I'll dump my husband and marry you just for the back rubs."
After another hour of relaxing outside, the patio door opened, and Susan and Carol's parents walked out. They hugged Susan and Peter and sat down to catch up with them. After a while, their parents told them they had made reservations for dinner. Peter said he wanted to take a shower, so he went inside. After a little while, Susan and Carol went inside to change for dinner.
There were lots of good restaurants in the area, but tonight they were going to everyone's favorite. Peter thought it was interesting that they were going to their favorite on a night when Carol's husband wasn't there. He thought his in-laws had the same feelings about their son-in-law that he had; one could tolerate him, but you didn't want him to be your best friend.
At the restaurant, they had drinks when they got there and wine with dinner. Everyone was feeling pretty good, although Susan's mom only had one glass of wine; she would be driving home. Peter loved visiting his in-laws. They were loving parents who treated him like their own son. The two girls loved each other, so everyone always had a good time when they got together. And he and Carol loved teasing each other. They were all very close.
They weren't home very long before Susan's parents went to their room for the night. The girls said they were going to get ready for bed, but Peter clicked on the TV in the family room. Once Susan got ready for bed, she usually stayed in the bedroom, reading before falling asleep. Carol came back to the family room in her normal sleeping outfit -- loose gym shorts and a long t-shirt. When she walked in, she grabbed a pillow off of the couch, threw on the floor, laid on top of it, and turned back to look at Peter. "C'mon, Peter, finish that backrub you started earlier."
Peter smiled as he got up off the couch. As usual when he gave Carol a backrub (if she wasn't wearing a bathing suit), she pulled her t-shirt halfway up her back so Peter could rub her skin directly. He sat on her butt and started pushing long, firm strokes from Carol's lower back up to her shoulders. Then he used his thumbs to really press into her muscles. She alternated between letting out groans of mild pain (which she claimed were "a good kind of pain") and groans of satisfaction when a muscle suddenly loosened up from the manipulation. He continued working his thumbs and palms firmly into her shoulders, upper back and lower back. She had her hands under her head so the sides of her torso were exposed, but he was very careful to keep his hands far away from any side-boob that might have been available under her t-shirt.
As the back rub continued, Carol started thinking about their time earlier by the pool. Again, she started thinking about how good his hands felt on her body -- and not just because he was rubbing her muscles. At one point when his hands were toward the top of her back but below her shoulders, she gave in to her temptations. Just as Peter's hands moved a little toward the edges of her back, she lifted up her torso and rested her weight on her elbows. Though her breasts were still covered by her shirt, they were hanging freely and very available for Peter's hands.
When Peter saw her lift up her body, a million thoughts flew through his head. Is she just stretching her body? Is she offering her tits to me? She CAN'T be offering her tits to me, can she? Okay, I need to deal with this carefully. I can tell her, "I'd like to, but you know I can't." Or I can say, "Carol, stop that! It's not appropriate." All these thoughts took less than half a second. And while he was trying to decide what to say, a different part of his brain took over. He reached around both sides of her body and placed his hands on her breasts. They both let out soft moans. Peter massaged both breasts and pinched her very hard nipples. He loved feeling her breasts. He'd cup them and massage them for a few seconds and then use his thumb and index finger to pinch her nipples. Both of them were breathing a little harder.
Suddenly Carol rotated her body slightly. She leaned more on her left elbow as she slid her right hand under her body, into her shorts, and into her pussy. As Peter rubbed her tits, Carol was masturbating. Peter could not believe this was happening, but he wasn't about to complain. As she fingered herself and rubbed her clit, she started whimpering a little, clearly trying to control herself so she didn't get too loud. Peter continued touching every inch of her tits and rolling and pinching her nipples as she started moving her hand faster and faster. After a few minutes, Carol started gasping and Peter, who was still sitting mostly on her butt, could feel her body jerking. She almost lifted him up with a few of her spasms as she let out a soft, long cry. Then she collapsed, her torso falling to the floor with Peter's hands trapped between the floor and her tits. She pulled her right hand out of pants and returned it to the original position beneath her head.
