Lisa grew up on the farm with her 3 brothers, Nick 21, Bobby 18 and Tommy 14, now 18 herself, she was enjoying the freedom, fresh air and wide open spaces.She had arrived home from school one day and was doing her homework in her room when she could hear unusual sounds coming from the room next door, it was shared by Bobby and Tommy, she crept into the hall and peeked through the slightly open door only to see Tommy sitting on the side of his bed, his pants round his ankles and stroking his very hard cock, Lisa could feel her pussy getting wet and kept watching till Tommy shot cum all over the floor, she crept back to her room but never said anything. She watched him each day then go back to her own room and finger herself till she had an orgasm, one day when she was watching she saw some movement to the side of her, looking up she saw Bobby looking at her, he signaled for her to follow him outside there he told her that he had given Tommy porno mags to jerk off with and asked if she enjoyed watching, she could only say yes so he asks if she wants to see someone fucking, she nods so he tells her about Nick and his girlfriend on Friday nights, go up into the hayloft and fuck each other crazy, Friday evening comes round, Lisa and Bobby head out to the barn about 6pm enough time to get themselves settled before they arrive, up in the loft Bobby has made a small room behind haybales with small gaps between to see out, they haven't been there long when they hear footsteps and Nick walks in with his girlfriend, they start kissing and undressing each other straight away, she drops to her knees and pulls down Nick's pants, his cock is semi hard as she takes into her mouth and starts sucking him, he doesn't take long to get a boner as she works it with her mouth, after about 5 mins he puts his hands on the back of her head and moans as he cums in her mouth, she swallows his whole load, lying down on a hay bale, Nick lowers his face to her pussy and starts to lick her out, his cock is semi hard and dribbling cum on the floor as he works his tongue between her pussy lips and plays with her clit, she starts to shake and moan as she cums on his tongue, Lisa looks over at Bobby but he is too busy watching Nick so she looks back to see Nick, his cock hard again, slipping into his girlfriend doggie style and fucking her hard, they fuck for 5 mins this way before she rolls over and he fucks her missionary style, they fuck about 18 mins before Nick pulls out and shoots cum all over her tits and stomach, she licks his cock clean then they dress and leave again, Lisa looks over to Bobby, he's looking at her with a big grin on his face, they both agree that it was hot to watch and Bobby tells her it happens each week, she says she wants to come back next week. For the next couple of weeks they watch them fucking each Friday night, on the 3rd week the weather has been very hot all week and the both dress coolly, Bobby is in t-shirt and shorts and Lisa is in a halter neck sun dress, Nick and his girlfriend arrive and before long both are naked and fucking each other, Lisa is busy watching them then looks over at Bobby, he is busy watching as well but he has his shorts round his ankles, he is stroking a massive 9in hard cock, it's as thick as Lisa's wrist with a huge knob and great set of balls, Lisa hears Nick moan as he cums then Bobby starts shooting cum onto the hay, he looks over and sees Lisa watching, he smiles as he milks his cock for her. After Nick has left, Lisa tells him he has a huge cock and enjoyed seeing him jerk off, school holidays are coming up and Bobby tells her about the old barn on the other side of the farm, he and some of his friends go there to jerk off she could join them if she wants, she agrees, the first day of the holidays is hot and Bobby is dressed in t-shirt and shorts with no underwear Lisa can see the outline of his cock, Lisa is in a summer halter neck again, they get to the barn and head upstairs where there is a couch and a few chairs plus an upturned crate for a table with mags on top, Bobby goes over and opens a door on the other side of the room, it opens out onto a balcony made from grating, Lisa picks up a mag and starts flicking through it then notices Bobby stripping and walking back toward her naked, his cock is getting hard as he walks, Lisa's eyes are glued to it, he picks up a mag and sits down, finding a good article he wraps his hand round his cock and starts stroking himself, Lisa sits down beside him she keeps looking between the mag and his cock, her pussy is dripping wet so she lifts her skirt to show off her smooth pussy then slips 2 fingers inside herself, thrusting them in deep, Bobby is now staring at her pussy as she fingers herself, his cock is getting harder, he stands up and starts shooting cum all over the floor, the sight of him cumming takes Lisa over the top and her whole body shakes as she cums on her fingers.