Author's Note: I don't own Harry Potter. I will never own Harry Potter. I am just a random nobody using someone else's characters in random settings on a fan-made website. Not making any money, just for pleasure. Read, review, criticize, all cool. But maintain civility. Now, enough of that. Let's get going.

Previously:

On the island, Harry and Susan tried to make the best out of their new surroundings. They didn't know where they were taken originally and where the ocean had taken them after their escape. They hauled the dinghy up onto the beach and after making a large S.O.S. sign on the beach, the two began searching for food and shelter.

Harry with his survival skills took the lead. He built a lean-to over the dinghy which served as their mattress. For food, they started by feasting on some of the fruits and vegetables they were able to find on the island before Harry was able to make a crude fishing net. It took some time, but with his wandless magic, he was able to catch some fish.

The first two fishes went to Susan. She objected, wanting to share but he insisted.

They were still in the clothes they wore when they were kidnapped. Susan in her cotton board shorts which covered up her bikini bottoms and a matching top, Harry in a pair of swim trunks and tank top. They had spent a lot of time in the sun while in the dinghy and tried to limit it as best they could. This time Susan took the lead, increasing their intake of vitamin C, which wasn't hard with the mango and papaya on the island.

On one particularly hot day, Harry and Susan were in the shade, lying down and chatting. Susan was curled up beside him, her arm draped over his chest, his arm protectively around her, holding her close.

"It's weird, I know I should be scared but I'm not," Susan said.

Harry chuckled, "I know what you mean. After being kidnapped and chased, getting stuck on a tropical island isn't so bad."

Susan looked up at him, "We're going to be rescued, I know it. Auntie and Uncle Sirius won't rest until they find us."

The two had come to enjoy their chats in the shade. The topic often had a doom and gloom element to it but they had grown even closer than they already were since this ordeal started that the mere presence of the other was enough.

A few days later Susan was on the beach, going for a swim. They had a fire set up beside their S.O.S. sign and were trying to make as much smoke as possible. Harry was intent on building a better shelter and decided to take a break. As he looked out onto the beach he saw Susan, wearing her bikini.

She was a very attractive woman. Every guy knew it, and so did Harry. He might be her so-called brother but he wasn't blind. As he stood watching her now, he found himself unable to take his eyes off her. The way she moved, her breasts, oh those breasts, her legs, her ass, oh that ass. Susan never had a lot of boyfriends, something else was always more important, but as he looked at her now, he realized she could have had any guy she wanted.

Susan turned around and smiled when she saw Harry, unaware of the thoughts running through his head. She jogged over to him, making her big tits bounce along the way.

"Taking a break?" she asked.

Harry smiled, "I was thinking about it."

Susan smiled back, "Well, stop thinking, come and join me." She stepped closer and tugged at his tank top, pulling it over his head and throwing it into the sand. Susan grabbed his hand and led him back to the water.

Harry willingly followed.

The duo dived into the perfect blue water. Susan surfaced first and splashed Harry when his head popped above water. Harry smiled and responded in kind. For a moment they forgot where they were, the seriousness of their situation and had fun. Splashing each other until Harry dived down and yanked Susan under with him.

Susan shrieked when she re-surfaced and playfully slapped at Harry. Their bodies were close now as they horsed around. With Harry being the bigger and stronger of the two he was able to gain the upper hand and soon had Susan in his arms, dunking her once more.

When they re-surfaced yet again Susan smiled and yelled for him to stop. Her breasts heaved from all the action, her arms now around Harry's neck. Harry held Susan in his arms as he caught his breath. He looked into her eyes and smiled. His cock twitched slightly when she smiled back. They stayed in that position for a moment too long until both were a little embarrassed and Harry gently let Susan go.

He smiled and cleared his throat, "I should get back to improving our shelter," he said.

Susan bit her bottom lip and nodded, "Okay," she said as her eyes twinkled. She watched as Harry walked onto the sand, her eyes never leaving his body the entire time.

Like Harry before her, she now thought of him. He looked good, especially with his shirt off. He was toned, sexy and strong. They had shared a moment in the water, a moment they probably shouldn't have.

Those kinds of moments and thoughts kept happening over the next week. It didn't help that they slept together in the dinghy with Susan sometimes using Harry's chest as a pillow. Harry's morning hard-on was a sore spot for him, thoughts of Susan were already multiplying in his head and he didn't need Susan to see a physical reaction of those thoughts, regardless of how natural it was.

One day Harry was walking back to camp when he spotted Susan. Susan was naked from the waist down and shaving. Soap and a razor were two of the items he was able to take from the cabin of the speedboat in his mad dash before it blew up.

Harry watched as Susan shaved her legs and then her pussy. He knew he shouldn't be watching but couldn't look away. Harry watched as Susan used careful care to shave, then once she was done, she ran her hand over her now smooth skin. Her fingers moved from her thighs to her vagina. She rubbed herself and closed her eyes, lying back as she enjoyed herself.

Susan slipped two fingers inside her pussy as she pushed her bikini top up and played with her breasts with her other hand.

Harry's cock got hard as he watched Susan start to finger herself. She started to whine with excitement as her fingers moved faster and faster. He grunted to himself as he squeezed his cock and watched.

Susan hissed with desire as she started to moan, her nipples now rock hard. She pinched and pulled them while her pussy made her fingers wet with her juices.

"Uh.. uh.. uh.. uh.. uh.. uh.. uh.. uh uh uh uh uh uh uh uh uh UHHHHHHHHHHHH" she moaned as an orgasm washed over her body.

Harry shuddered with lust as he watched Susan cum on her own fingers. He slipped away to masturbate away from Susan with the erotic image of her sinful body and her moans fresh in his mind.

In the days following Harry peeping on Susan, she noticed him acting a little different, a little distant. She had no way of knowing he was conflicted. He was as turned on as he was embarrassed and ashamed for watching Susan and enjoying it.

"Are you okay Harry?" she asked as she handed Harry a coconut.

Harry smiled as he took the coconut; he avoided eye contact for a moment before looking Susan in the eye. "Yeah, just a little tired, that's all" he lied.

Susan leaned in, concern in her eyes, her hand on his body, her touch was electric.

"Ooohhh you poor baby, you've been working yourself ragged since we got here. You go lie down for a bit, I'll go get some firewood for tonight," she said while turning away to set off on her chore without even waiting for Harry's response.

Harry watched Susan walk off, his eyes once again scanning her body.

He walked back to their camp and sat down. He couldn't get Susan out of his head. He knew he should but deep down he didn't want to. Just thinking about her now made his cock hard. It had been a while since he last had sex, a few weeks before they left for the family vacation being the last time. Now he was on an island with a beautiful woman who consumed his thoughts, carnal and otherwise.

He stood up and moved away from the camp, walking into the vegetation he came to a grassy area and pulled out his cock.

It was hard with thoughts of Susan in her bikini swimming in his head. Harry squeezed his cock as he started to stroke, thinking of Susan. He groaned as he thought about her in his arms again in the water. His cock throbbed as he thought about her standing in front of him, taking off her top. Blood pumped to his organ as the woman in his dream took off her bottoms to match her top, laid bare before his lustful gaze.

He started to stroke his cock, groaning with delight.

He squeezed it again as he pumped his shaft, thinking about Susan. He fantasized about licking her, kissing her, tasting her and then fucking her. He thought about fucking her hard and fast then slow and sensual. He thought about her on top, her hands on his chest as she bounced on his cock.

Harry groaned again.

"Mmmm fuck Susan! I want you so bad!" he said to no one.

Harry stroked his cock, faster and faster until his fantasy was interrupted by a loud gasp, wood falling to the ground.

Harry opened his eyes to see Susan standing off to the side, wood at her feet as she watched Harry stroke his cock. For a moment neither of them moved. They stood and stared at each other. Once the moment passed, they both moved quickly. Harry put his cock back in his trunks while Susan picked up part of the wood and scampered off to the camp.

Harry picked up the remaining pieces of wood and followed Susan. Once there he put it down.

"Listen, Susan about what you just saw…" he started.

Susan looked at him, "What I just saw? What I just saw was you stroking your cock and saying MY NAME!" she exclaimed.

Harry broke eye contact with Susan.

"HARRY! We - YOU can't be doing this! It's wrong!"

Harry looked up at Susan. "Sue, let me explain" he started again.

She cut him off. "No, let me explain Harry. I am your godfather's niece, Harry! You're practically my brother! You can't have those thoughts right now. We need each other on this island to survive; you can't be thinking those thoughts. They aren't right."

Harry sighed; he'd heard this tone in Susan's voice before and decided to put off any thoughts of defending his actions. He smiled, "Ok, you're right, I'm sorry."

Over the next month, the duo tried to return to the normalcy that was their life on the island. In the days immediately following Susan finding Harry cock in hand, she wore her shorts when she was around him. They weren't long and did little but they were better than nothing, and the message from her was clear.

They didn't talk much for the next few days, spending time alone but they were the only two people on the island and that could last for only so long. Slowly the incident became less an issue and laughter returned.

The duo decided they would travel across the entire island as best they could and set out to see what, if anything, they could find.

There was nothing of significance on the island during their travels, save for a few wild pigs, none of whom they could catch.

Harry and Susan returned to their camp ready to set in for the long haul. They hadn't seen a ship once while on the island and had no idea if they ever would.

It was a bright, sunny morning. Susan didn't know what day of the week it was but she knew it was their 65th day on the island. Harry was sleeping beside her and as usual, he had a morning hard-on. It was actually the cause for her waking up. Susan woke up to Harry's arm over her protectively and his cock against her ass.

As she slipped away from him slightly, Harry rolled onto his back. His cock made a tent in his trunks as he slept soundly.

Susan looked at Harry and Harry's hard-on. The sight of his cock in his hand was still fresh in her mind as was her name rolling off his lips.

Her outburst had been fuelled by the shock of seeing him and her own shame for owning those same feelings.

But it was wrong, of that, there was no doubt. Brothers aren't supposed to think about their sister that way just like sisters shouldn't be fantasizing about their brother.

'But we aren't brother and sister, not really'

As Susan silently reviewed her inner turmoil, she didn't realize Harry had woken up and saw her staring at his cock as she got lost in her thoughts.

"Enjoying what you see?" he asked.

Susan woke up from her silent discussion and immediately turned red. "What!?... NO! ...SHUT UP!" she exclaimed, clearly embarrassed.

Harry didn't press the issue and simply stood up, "Okay," he said as he stepped out of their shelter. He turned back to look at Susan, "I'm going to go for a swim."

He wasn't in the water for too long before he saw Susan approach him and walk into the water to join him. The duo swam together for a short while before they moved to the shore and sat down in the water to talk.

"I should apologize," Susan said.

Harry looked over at Susan, "You don't have to Sue." She smiled and shifted closer, "Yes I do. I yelled at you for feeling the same things as me. I shouldn't have done it."

Her words hung in the air for a moment as Harry and Susan studied each other. Harry broke the tension when he smiled and leaned over to Susan. His eyes were locked on hers before he broke eye contact to whisper in her ear, his breath hot on her neck. "I'll accept that apology if you give me a kiss."

Harry pulled back as Susan couldn't help but smirk. She looked at him and then leaned into him, her lips brushed against his own before she kissed his cheek. Her heart pounded against her chest as she kissed his cheek. She could see the disappointment on his face that the kiss wasn't on his lips.

"Silly boy," she whispered as she slid onto Harry's lap, straddling him as she started to kiss him with meaning this time.

Harry groaned as Susan kissed him. He instantly returned the kiss, his hands sliding slowly over her body. Susan pulled back for a moment and smiled, then kissed Harry again, enjoying the feeling as Harry kissed her and rubbed her softly.

The duo started to get turned on by their kiss. It was impossible for Susan not to feel Harry's hard-on just like it was impossible to miss her hard nipples. Out of instinct, they started to grind together while they kissed in the water, losing themselves in the moment before Susan stopped.

"Wait, hold on..." she smiled. "I like this but it's going way too fast... okay?" she asked.

Harry smiled; Susan was still on his lap in the water. "Okay," he responded.

Susan flashed a sweet smile back at Harry, glad he wasn't mad and didn't push the issue. "Thank you," she said softly as she leaned in to kiss his lips again before standing up and walking out of the water well aware that Harry was staring at her the whole time.

The kissing session changed things for Harry and Susan dramatically. It was as if a wall had been knocked down. While they didn't talk about it, it wasn't the only time they kissed. The duo started kissing frequently after that. They kissed in the morning, they kissed at night, and they kissed during the day when they wanted a break. They began to look forward to their kissing sessions and usually, all it took was a look from one to spark it.

Harry loved the feeling of Susan in his arms while they kissed. He loved feeling her skin, rubbing her softly and stroking her while they kissed. Susan began to enjoy rubbing herself on Harry's hard pole while they kissed. The chats they had when they were first lost on the island returned but now lasted for much longer and almost always included moments where they kissed.

Deep down they were both worried they would never be rescued and had started to joke about it to soothe their nerves.

One night they were lying by the fire, Susan was in Harry's arms while his fingers slid over her body.

Susan cooed softly as Harry's hand rubbed her softly. His fingers slid over her body before rising up to her bikini top. He started to tug at the strings, undoing it, going farther than he had before.

"Harry?" she looked up surprised but not mad.

His smiling face greeted her as her gaze met his. He chuckled, "You're lucky I've lasted this long Susan," He rolled her onto her back as he looked down at her. "Only kissing you and not doing anything more is like leaving a Firebolt but not flying on it, it's a crime against humanity."

Susan giggled, blushing as Harry took off her top. He leaned over to kiss her then let his lips trail over her body. He kissed her cheek, her jaw, her neck, her chest and then her breasts. Her nipples were hard as Harry kissed them.

He started to rub them as he kissed her. His tongue trailed over her nipples as he enjoyed her body. She wiggled softly as Harry licked her breasts and then sucked on her nipples. He rubbed the sides of her breasts, his entire concentration on her breasts.

Susan's hands went to his head, holding him in place. Harry sucked her left nipple and then her right before moving back to her left. He kissed between her breasts and then all over them and savoured every second.

His head went further down her body, his tongue leaving a trail of saliva down her stomach as he made his way to Susan's pussy. He tugged at her bikini bottom strings with his teeth and undid them without a word of protest from Susan.

Harry smiled as he looked up at Susan and then back down at her wet pussy. He kissed her pussy and then licked her, tasting her sweet nectar.

"Ooooohhhh Harry" she moaned.

Harry smiled as Susan moaned; he continued to lick Susan's pussy, flicking his tongue against her. The longer Harry licked, the louder Susan got. And the louder Susan got the more Harry wanted Susan's pussy.

He pressed his tongue down into her and sucked her juicy pussy. He started to finger her while licking her clit.

"Mmmmmm Susan... mmm god... you're so wet... so so wet" he groaned.

"Oh god Harry, don't stop... please don't stop" Susan begged.

Harry smiled as he fingered Susan faster and faster. Susan groaned, "Gods this feels better than I ever could have dreamed."

Harry pulled his fingers from Susan's pussy and he sucked them clean. Susan smiled and reached up, taking his fingers and sucking them as well. "Mmmmm god Susan, you look so hot, so perfect" he groaned.

Both of their hearts were thumping, and their blood pumping. Harry's cock was rock hard and the duo knew they'd gone past the point of no return.

Susan looked up at Harry, her pussy drooling wet with excitement.

"Fuck me, Harry," she smiled.

Harry started down at Susan.

"Fuck me... fuck me right now...fuck your sweet sister."

Harry's cock throbbed as he looked down at Susan. He stood up, his body looming over her as he took off his trunks, his big hard cock springing free.

He started to stroke his cock, teasing Susan.

"You aren't going to make me beg, are you brother?" Susan asked a twinkle in her eye.

Harry smiled and simply nodded, not saying a word.

Susan bit her bottom lip and smiled, looking up at him.

"Fuck me, Harry. Fuck your sister. Please please please PLEASE FUCK ME!" she moaned.

Harry couldn't help himself, his cock was throbbing and Susan could see it. He moved down to Susan and mounted her. He grabbed her wrists and pinned her down even though she was more than willing.

Harry's cock rubbed against Susan's wet pussy. "Fuck me brother... fuck me.. fuck me... fuck me" she teasingly whined.

Harry groaned with desire and Susan smiled with satisfaction. She felt Harry's cock pressing against her and he leaned down to lick her lips as he started to push his cock inside her. Harry's gaze never left hers as his cock started to slide inch by inch inside Susan's warm wet pussy.

With remarkable composure he pushed his cock inside Susan until he could go no further; he was balls deep inside Susan.

His breath was hot on her body, their gaze locked on one another.

Susan licked her lips slowly and then moaned, "Fuck me, big brother!"

His eyes bulged with lust as Susan moaned one last time. He pulled his cock back and thrust back into Susan, fucking her with pent up lust and desire.

Susan moaned out as Harry started to fuck her, "OOOOOOOHHHH YES HARRY YES YES YES!" she exclaimed. Harry controlled her body and his as he fucked her, his big cock pumping in and out of her for the first time. He held her body in his arms as he fucked her. Using her as his fuck tool but making her feel like anything but.

Harry didn't say a word as he fucked Susan but he didn't have to. She could see in his eyes how much he was enjoying it. After his initial thrusts, he slowed down, working to a normal pace as he fucked Susan, filling her completely with his cock.

Their bodies started to sweat as the fucked by the fire on the beach. Brother and sister together as one, interlocked in their taboo lust.

They kissed as they fucked, Harry, grinding down into Susan. He licked the sweat from between her breasts as they fucked. Tasting her sweat and skin and loving every bit of it.

"Oooohhhh god yes Harry... your cock feels so GOOD... it feels so RIGHT" Susan encouraged.

Harry smiled as he fucked her and spoke for the first time. "Mmmmm god yes, Susan... I can't believe how good you feel" he grunted.

Susan started to grind with Harry, fucking him back as they shared their bodies completely with one another on their deserted island. Susan held onto his body as he held onto hers, enjoying their fucking far more than she could have ever enjoyed fucking anyone else. She couldn't believe it was him giving her possibly the most intense fucking of her lifetime.

He grunted as he thrust his cock deeper inside her, his balls slapping against her as they fucked. His cock started to throb just as her pussy started to tremble, the duo's orgasms building at the same time as if they'd been lovers for years.

Susan held Harry inside her as they fucked with passion, not letting him pull out. Finally her pussy clamped down on his cock as their orgasm's boiled over and they came together.

"UUUUUUGGGGGHHHHHHH" Susan moaned, unable to emit an actual word as her orgasm washed through her body.

Harry held Susan tightly as he went rigid and then exploded inside her. "Mmmmmm fuck YES Susan YES!" he yelled out.

Both lovers came together, Susan's juices soaking Harry's cock as he unloaded his cum inside her. Slowly his thrusts began to die down until they finally stopped.

Susan and Harry shared a contented kiss to cap the fucking as he pulled out of her and stood up. Leaving their bathing suits in the sand he picked his freshly fucked lover up and carried her in his arms to their makeshift bed so they could sleep together for the first time as lovers. Within minutes they were asleep, Susan curled up against Harry with his arm protectively around her.

To be continued...