A/N: Thank you again for your encouragement! This is the final chapter for this pairing, but there's more to come for the Potter family. We can't leave anyone out, can we? :)

Warnings: As stated in Chapter 1.

GPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSP

James' request was quietly voiced and his tone shy. Neither lessened the impact of what his words meant.

Ginny's heart started to pound. To be honest, she had already acknowledged this as a distinct possibility the moment she let him lead her out of the bathroom. Voicing it out just made that possibility greater, aided by their current surroundings. After all, the two of them were alone in a room with a bed in it. They were already sitting on said bed and clothing had been discarded…. most of them anyway.

Swallowing hard, Ginny dropped her gaze. She found herself staring at James' arousal again, the smooth length and head glistening with released fluids. He was semi erect despite having come earlier; twice, if she weren't mistaken.

Oh, this was wrong! This was wrong and she knew it. She had never before entertained such thoughts about anyone else once she and Harry started dating each other. They were each other's firsts. She was a happily married woman and mother now with an active and fulfilling sex life... more than a lot of couples her age, she was certain. Besides, James was her son, their son, their own flesh and blood. And even if he weren't, he was only thirteen years old, for Merlin's sake!

If he had made his request out of the blue, she would have slapped him across the face for such brazen, presumptuous impudence. She had, but she had also let him pleasure her after that. Not just once, but twice.

"Mum?"

Ginny looked up again, her heart giving a pang at the earnest, hopeful expression on James' face. She quickly shook her head before she could succumb to temptation.

"James, you are too young to be thinking of this. Besides, you should save yourself for someone you love."

"I love you, mum."

Ginny exhaled sharply, fingers clenching in the covers as she forced herself to hold his stubborn gaze.

"You know that's not what I mean."

James bit his lip at her rebuke, but his chin tipped up in a familiar gesture.

"I know. I know this is wrong. But I - I just want to know what it feels like!"

Despite the situation, Ginny's lips twisted in a mirthless smile. James' curiosity will be the death of him one day.

"You will get to know one day. Just be patient."

Seeing James about to protest, she shook her head again, letting go of the covers to rake trembling fingers through her long hair.

"No. This has gone on too far as it is."

She forced her reluctant limbs to move, scooting to the edge of the bed and standing up on slightly unsteady legs before looking over her shoulder. Her face softened at James' crestfallen expression.

"And I can't let you remember this either, love. I'm sorry."

"No!" James protested at once, looking and sounding betrayed.

Feeling her eyes sting, Ginny turned away and blinked rapidly.

"I'm sorry," she repeated, her voice shaking despite her best effort. "I never should've let you -"

She broke off when James pressed against her from behind, a firm and sticky length sliding between her thighs. Two small hands came from behind to cover her breasts once more, kneading her soft flesh and puckering nipples.

"If you... if you're really going to Obliviate me," James said, his voice shaking as much as hers, "at least make it worth my while first?"

Ginny spun around, her action knocking his hands from her body. He was looking up at her, his eyes huge and his expression more serious and earnest than ever before.

"Darling, you can't be serious!"

"I am," James declared and gave a decisive nod. "I want this, mum. I want to know even if briefly, what it's like to make love to you."

Ginny's resolve wavered in the face of her son's determination. She was tempted, tempted beyond anything she had ever felt before.

"Even if you don't remember it later?" she asked, more to stall for time than anything else.

James nodded and gave her a sad smile.

"Even then," he promised.

Ginny's vision blurred again. She took a deep breath and then another, feeling like she was about to step off a high cliff. Finally, she nodded and smiled.

"All right, love," she said. "I will be your first."

Merlin help them both.

GPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSP

James blinked at his mother. At first, he was somewhat stunned at having gotten her acquiescence and then his emotions kicked in, seesawing between sky high elation at what he had been granted and gut wrenching despair that he wouldn't get to remember it for long.

All of a sudden, his eyes were stinging. Merlin, he couldn't even remember the last time he had cried! Crying was for girls like Lily or sissies like… well, definitely not for their older bother!

Was it because he wouldn't be able to take away what was sure to be the best experience of his young life?

Wait - there had to be a spell that could counter Obliviate. His father was famous for being able to overthrow the Imperius so perhaps there was a way to overcome this as well?

"James, if you've changed your mind…"

"What? No! No, I haven't!"

Shoving his thoughts to the back of his mind, James grabbed his mother's hand and tugged on it, relieved when she got onto the bed again without protest. She even leaned back on straightened arms, legs stretched out before her, parted and bent at the knees, letting the light from the bathroom spill on her.

James climbed onto the bed as well and knelt next to her, careful not to block the light. He was unaware of how anxious he looked as his eyes roved from the long red hair tumbling over her shoulders to her lovely breasts and soft stomach and then lower, to the lacy underwear riding low on her hips.

Uhm. What should he do first?

"You might want to start with removing my knickers."

James' gaze snapped up to Ginny's face. He relaxed when he saw her smile teasingly at him, his nervousness melting into a sheepish smile.

"Yeah, I suppose I should," he agreed.

Hooking his thumbs in the waistband of her knickers, he slid it past her buttocks when she raised them, and then down her shapely legs before tossing the damp material aside. His fingers were trembling in anticipation, his mouth going dry at the realisation that they were really going to do this.

Ginny leaned back on her elbows and shook her hair back. She shifted her legs wide apart again, an almost challenging glint in her eyes as she tilted her head at James.

"Well, come on then."

Grinning excitedly, spurred on by those inviting words, James crawled over her thigh and settled between her legs. He was giddy with anticipation, his heart pounding so hard it echoed in his ears. He inched forward, gulping when his mother lifted her legs and rested both thighs over his own. Then he looked down and realised his own body was blocking out the light.

"Mum? I can't see anything now."

"Hold on, I know what to do."

Leaning on one elbow, Ginny reached her other hand backwards and retrieved her wand from her shoulder bag. She held it up and whispered "Lumos", letting the soft white light fall on their bodies.

James inhaled sharply at the sight of his erection so close to his mother's glistening flesh, a scant inch away. His body gave an excited throb and he was suddenly seized with a primal urge to just push forward and seat himself inside her.

Instead, he took a deep breath and ignored it. He didn't usually hold back on anything that excited or pleased him, but this was different. Knowing he wouldn't remember his first time with his mother made him want to prolong the experience as long as he could. He savoured the sweet ache of anticipation in his stomach as well as the musky scent of their bodies, trying his best to commit it to memory.

Sex was something James knew his parents indulged in regularly, judging by their loving kisses and hugs in front of their children and their whispered conversations that put a deep grin on his father's face and a pretty flush on his mother's. That was all fine with James; he wasn't jealous of his father or wanted to take his place or anything like that. He just… he just wanted to know what it was like, and not just with any female, but his mother.

He let his eyes trail up her naked form again and when their eyes met, he leaned forward. Placing his palms flat on the bed on either side of her head, he pressed his lips to hers in a kiss that was soft and gentle.

"Love you, mum," he whispered shakily.

"Love you too, son."

James pushed himself upright again, trying not to notice how his mother's eyes were shimmering with unshed tears. He looked down between their legs and let himself be distracted by what they were about to do, anticipation filling him until his body ached with need once more.

"Hold yourself with one hand, that will help," Ginny suggested.

Nodding, James wrapped his fingers around his shaft, unable to resist sliding his fist up and down its length a couple of times. He exhaled at the sensation, eyes sliding shut.

"Here, this will make it easier."

James opened his eyes when he felt his mother's legs slide from his. She brought them in close to her chest, both knees bent and far apart, one hand still holding her lit wand aloft.

With his heart almost bursting from his chest, James guided the head of his erection to her opening, her nether lips flushed, engorged and parted in welcome. He shuffled closer, praying he wouldn't spend himself before he even went inside.

The first touch of wet and sensitive flesh brushing against equally wet and sensitive flesh made him gasp. Not daring to breathe despite his burning lungs, he pressed forward and found himself sinking into rich, moist heat. Eyes going wide and mouth falling open at the discovery, he pushed deeper and deeper into that snug fit until he could go no more.

It felt… it was… oh, Merlin, there were no words to describe how incredible it felt, buried deep inside her, buried in the very place he had emerged from thirteen years ago. The wonder of it left James speechless.

When the familiar sensation of his body tightening alerted him to a more pressing concern, he let his breath out with a whoosh before sucking more air into his lungs. He held it, squeezing his eyes shut at the same time.

Not yet. He didn't want to come just yet.

GPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSP

Ginny was trembling at the knowledge that the male body between her legs wasn't her husband's, and that the hard flesh buried deep inside her wasn't his, but their son's. James wasn't as big as Harry yet but she knew he would be one day. Even now, his length was enough to stretch her nicely.

A sudden thought occurred to her then and she stiffened.

"Wait - don't move a muscle, James," she ordered. It wasn't necessary; he had frozen in place, looking as if he was fighting not to come, but she didn't want to take any chances.

Nox'ing her wand, she pointed the tip at her abdomen and cast the complicated spiral of the contraceptive spell, murmuring the words under her breath. The sight of the light purple sigil vanishing into her skin made her limp with relief. She couldn't believe she had almost forgotten about it!

She dropped her wand on the bed and smiled at James, holding out her arms.

"Lean forward, love."

GPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSP

James bent forward carefully, his breathing rapid and shallow. Despite having climaxed twice, he still feared he would come at any second. He lowered himself until he was resting on his mother, his head pillowed on those gorgeous breasts. He felt her arms and legs close around him and soft kisses pressed to his hair.

"You feel so good inside me," Ginny praised.

James swallowed. He didn't know how he was going to go back to using only his hand after this even though technically, he wouldn't remember the difference.

"You feel even better, mum," he whispered back. "So hot and tight and – and wet…"

Her chuckle made him blush, feeling every bit the innocent thirteen year old he was. As if sensing his embarrassment, her limbs tightened around him.

"You can move now if you want," she prompted.

"I'm going to come the moment I do," James confessed in a small voice. "I… I don't think I can wait for you. To come at the same time, I mean."

Ginny's delighted laugh made his face burn even more before gentle hands framed his hot face and brought it up.

"That's fine, darling. We don't have to come at the same time," she said and smiled mischievously. "So – are you still up for it?"

Feeling his embarrassment melt away, James raised himself up and grinned down at her.

"Hell, yeah!" he declared.

"James Sirius Potter, that's no reason for swear!" Ginny scolded, eyeing him sternly.

James blinked and then shook his head a bit as if what she said was beyond his comprehension right now. Holding onto her shoulders, he slid back a bit and then rocked forward, his mouth falling open again.

"Oh."

He did it again.

"Oh, mum!"

At the sight of Ginny's encouraging smile and nod, James began moving in earnest. Mind blanking out in sheer lust, he drove into her again and again, lost in the tight grip that swallowed him each time.

"Oh – oh – oh…" he chanted and then he froze, body snapping rigid. With a cry, he came for the third time, hips thrusting frantically as he pumped all he had deep inside his mother, fingers gripping her shoulders and toes curling into the sheets.

GPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSP

Ginny kept her eyes open, wanting to capture every single emotion displayed on James' face. He wasn't moving at the correct angle to stimulate her enough, but she didn't mind. Feeling him push into her again and again, and seeing the stark, raw bliss painted on his face as he came was enough.

As soon as he collapsed onto her, she wrapped her arms and legs around him again and held him close. She found herself smiling at his labored breathing and treasured that same ache of pride and guilt inside her.

"Are you all right?" she asked after a while, her lips pressed to the sweat dampened hair.

"Mmm, yeah."

James sounded half asleep already and she shook his shoulders.

"Don't fall asleep now," she warned. "We still have to get home, you know."

James shifted and uttered a surprised sounding 'Oh' when his softened flesh slid out from her, pulling a shiver from both of them. Then he raised his head and stared down at her, his eyes glowing with newfound knowledge.

Ginny returned his gaze without speaking, her throat feeling tight.

"That was sooo good, mum."

Sliding off of her with a satisfied sigh, James propped himself on one elbow, his eyes still intent on her face. His hand slid down her side and across her thigh before slipping between her legs.

Ginny couldn't help blushing at the strangely knowing smile on her son's face as he started stroking her, his movements less clumsy and more confident than before. When he bent down to kiss her, she opened her mouth and welcomed his kiss, her tongue playing with his, her breath coming quicker past her lips as he swiftly coaxed her onto her third orgasm.

She convulsed with a soft moan and found that this time, she didn't even have to tell James when to stop. He was a quick learner and an apt student, in this subject at least.

When she next opened her eyes, her body quivering and deliciously sated, James was still staring down at her, his expression now open and vulnerable.

"Mum, don't do it," he whispered. "Please. I don't want to forget this. Ever."

Ginny's eyes stung again.

"I don't want to, James. I really don't, but I can't risk your father finding out, or Albus or Lily. I don't want to hurt any of them."

James shook his head.

"I swear I won't tell them," he said desperately. "I won't tell anyone. This will be our secret. I swear it, mum!"

Taking a deep breath, Ginny sat up, the intent look in those brown eyes chipping away at her resolve. Since he was old enough to indulge in this then... perhaps he was old enough to take responsibility for it as well?

She didn't want this to be their first and last time either. Taking a deep breath, she nodded once.

"Fine. But we'll have to be very, very careful," she said and wasn't surprised when his eyes lit up.

"Oh, mum! I promise I won't tell a soul!"

Ginny couldn't help laughing when James lunged at her and they both fell back onto the bed.

GPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSPGPJSP

Half an hour later, they were ready to leave the Leaky Cauldron.

Ginny had spelled both of them clean and after they had gotten dressed, tidied up the room. She spelled the bedsheets clean with a foolproof charm taught by Molly, remade the bed and then cast cleaning charms on the floor of the room and the bathroom. She didn't want to take any chances.

By the time she and James flooed home, Harry, Albus and Lily were already sitting around the large kitchen table.

"Mum, James!" Lily cried out when they stepped out from the fireplace, laden with shopping bags.

"Hi, all." With admirable nonchalance, James dropped the bags he carried on the nearest surface before making for the sink to wash his hands, his cheeks the slightest bit pink.

Harry got up and went over to Ginny, looking relieved.

"Everything all right, Gin?" he asked, dropping a kiss on her cheek and taking her bags from her.

"Fine," she said and smiled at him. "Sorry we're late. It had started pouring by the time we finished so James and I had a cup of tea and some sandwiches at the Leaky while we waited out the rain."

She was relieved when no one noticed the tiny tremor in her voice.

"Well, you two have been gone hours!" Lily said.

"Yeah," Albus agreed. "Dinner's ready – dad made roast chicken and baked potatoes."

"I know, it smells delicious!" Ginny smiled at her two other children.

"Since you've had tea, James, I don't think you'll be able to eat much now," Harry commented as he sat down. He winked at Albus and Lily, and they both grinned at him, knowing their older brother's appetite.

"Are you kidding, dad?" James asked in mock indignation. He sat down at his usual seat and stared appreciatively at the food. "I'm starving!"

"So am I," Ginny added. She went to wash her hands at the sink and heaved a sigh of relief.

Everything was going to be all right.

A/N: Thank you for reading. Please review!