She sat on the edge of the small platform and stared down at the pool water, while her brother finished chaining her wrists and ankles. This was not what she had expected. When she had asked him to do this for her, she had told him he could pick the method. But, she had expected a rope around the neck. She'd actually been looking forward to the rope. The heavy padlock snapped closed behind her. She glanced over her shoulder at the wraps of chain that bound her to the bag of machine parts. The wooden platform was barely large enough to hold both her and the bag. The above ground backyard pool was barely large enough for what her brother wanted. Barely deep enough - She braced herself for the push over the edge. But, instead, she felt her brothers hands on her fur. Her ears twitched as he gently carressed them. His fingers slid down to the sensitive spot behind her ears and he softly scratched there. Ripples of pleasure ran down her body to her loins. His fingers slid down to the creases on the sides of her neck. Then down over her shoulders. When his hands gripped her small teats, a groan escaped her lips. At thirteen years she was scarcely more than a pup, and her teats weren't even large enough to fill her brothers hands. But the nipples were erect and hard and, oh, so sensitive. He squeezed her teats, and cupped them, and ran his fingers over the nipples, and drew tiny circles around the hard nubbins, and it was like igniting a fire in her hips. Then his hands drifted down again, over her flat belly reaching for her crotch. When the fingers of his left hand curled between her legs, the jolt of erotic thrill forced her a gasp from her. Her brothers fingers probed into the soft flesh of her young sex. She found herself panting in time with the stroking of his finger plunging in and sliding out. She spoke no words, but in her mind she was begging him: make me cum brother, just do it long enough to make me cum! His right arm tightened around her waist, and he lifted. She felt herself moving, but was so focused on the yiffing finger, that it meant nothing. She heard the scrape of the heavy bag, and felt the pull on the chain around her limbs. The bag slipped off of the platform. Her brother let go of her. And in her mind her silent voice screamed: he's doing it! He's really doing it! The orgasm was like an explosion that burst out of her hips and filled her whole body. Sitting on the bottom of the pool, the cool water stripped the after glow of her orgasm from her. She realized that she had managed not to scream, and had kept her mouth closed. Had she taken in a last breath? She wasn't sure. She hoped so; whatever air she held in her lungs was the last she would ever know. Her brothers feet appeared above her, and he slid down into the water. His erection bobbed in front of her face. As he stepped forward she opened her mouth and took that swollen member into her muzzle. She used her tongue to stroke him. She used her mouth to massage him. She slid back and forth on him, without ever entirely letting him free. She could tell it was working, because she could feel him twitching and taste the bitterness of his pre-cum. She wanted to reach up and wrap her hands around his buttocks, but she couldn't. The heavy chain binding her wrists and ankles together was fastened to the bag of machine parts, and it's heavy weight was holding her immobile on the bottom of the pool. Her lungs ached with the need to breath. She was becoming light headed, and her nose itched. She struggled to concentrate on pleasuring her brother; struggled to ignore the panic growing in her body. Her arms started to jerk against the chains, and she forced them to be calm while licking the tip of his erection. Her legs tried to push her up off of the bottom, and she couldn't stop it, although she still tried to pull and caress the man flesh in her mouth. A cough escaped her, bubbles forced past her teeth. She couldn't last much longer, but she wanted desperately to make him cum, first. She jammed her muzzle against him, forcing the tip of his sex into the back of her mouth, trying to use him to block her throat. He helped by gripping her head, and pulling her nose tight into his belly. She gagged. She tried to retch. She no longer had any control of her frantically flailing body. The silent voice in her mind cried out: cum for me brother! Cum in my mouth! Cum now, while I still can! Then he was gone. Freed of the gagging pressure in her throat she retched, and rivulets of semen and bile spewed into the water. She took a deep breath - The cool water filling her lungs shocked her into a moment of clarity. She could see her brothers erect sex standing before her. She could see little squirmy drops of semen floating in front of her face. Her body was numb. Her mind felt calm and dreamy like going to sleep. She felt her heart stop. She sat on the edge of the small platform and stared down at the pool water, while her brother finished chaining her wrists and ankles. This was not what she had expected. When she had asked him to do this for her, she had told him he could pick the method. But, she had expected a rope around the neck. She'd actually been looking forward to the rope. The heavy padlock snapped closed behind her. She glanced over her shoulder at the wraps of chain that bound her to the bag of machine parts. The wooden platform was barely large enough to hold both her and the bag. The above ground backyard pool was barely large enough for what her brother wanted. Barely deep enough - She braced herself for the push over the edge. But, instead, she felt her brothers hands on her fur. Her ears twitched as he gently carressed them. His fingers slid down to the sensitive spot behind her ears and he softly scratched there. Ripples of pleasure ran down her body to her loins. His fingers slid down to the creases on the sides of her neck. Then down over her shoulders. When his hands gripped her small teats, a groan escaped her lips. At thirteen years she was scarcely more than a pup, and her teats weren't even large enough to fill her brothers hands. But the nipples were erect and hard and, oh, so sensitive. He squeezed her teats, and cupped them, and ran his fingers over the nipples, and drew tiny circles around the hard nubbins, and it was like igniting a fire in her hips. Then his hands drifted down again, over her flat belly reaching for her crotch. When the fingers of his left hand curled between her legs, the jolt of erotic thrill forced her a gasp from her. Her brothers fingers probed into the soft flesh of her young sex. She found herself panting in time with the stroking of his finger plunging in and sliding out. She spoke no words, but in her mind she was begging him: make me cum brother, just do it long enough to make me cum! His right arm tightened around her waist, and he lifted. She felt herself moving, but was so focused on the yiffing finger, that it meant nothing. She heard the scrape of the heavy bag, and felt the pull on the chain around her limbs. The bag slipped off of the platform. Her brother let go of her. And in her mind her silent voice screamed: he's doing it! He's really doing it! The orgasm was like an explosion that burst out of her hips and filled her whole body. Sitting on the bottom of the pool, the cool water stripped the after glow of her orgasm from her. She realized that she had managed not to scream, and had kept her mouth closed. Had she taken in a last breath? She wasn't sure. She hoped so; whatever air she held in her lungs was the last she would ever know. Her brothers feet appeared above her, and he slid down into the water. His erection bobbed in front of her face. As he stepped forward she opened her mouth and took that swollen member into her muzzle. She used her tongue to stroke him. She used her mouth to massage him. She slid back and forth on him, without ever entirely letting him free. She could tell it was working, because she could feel him twitching and taste the bitterness of his pre-cum. She wanted to reach up and wrap her hands around his buttocks, but she couldn't. The heavy chain binding her wrists and ankles together was fastened to the bag of machine parts, and it's heavy weight was holding her immobile on the bottom of the pool. Her lungs ached with the need to breath. She was becoming light headed, and her nose itched. She struggled to concentrate on pleasuring her brother; struggled to ignore the panic growing in her body. Her arms started to jerk against the chains, and she forced them to be calm while licking the tip of his erection. Her legs tried to push her up off of the bottom, and she couldn't stop it, although she still tried to pull and caress the man flesh in her mouth. A cough escaped her, bubbles forced past her teeth. She couldn't last much longer, but she wanted desperately to make him cum, first. She jammed her muzzle against him, forcing the tip of his sex into the back of her mouth, trying to use him to block her throat. He helped by gripping her head, and pulling her nose tight into his belly. She gagged. She tried to retch. She no longer had any control of her frantically flailing body. The silent voice in her mind cried out: cum for me brother! Cum in my mouth! Cum now, while I still can! Then he was gone. Freed of the gagging pressure in her throat she retched, and rivulets of semen and bile spewed into the water. She took a deep breath - The cool water filling her lungs shocked her into a moment of clarity. She could see her brothers erect sex standing before her. She could see little squirmy drops of semen floating in front of her face. Her body was numb. Her mind felt calm and dreamy like going to sleep. She felt her heart stop.