Sorry for the long wait guys. I hope you've noticed that I started a second story in the meantime. More on that in my A/N below. First, let's get back to the Stabler/Benson family.

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50.

Olivia hadn't know this kind of love existed. She couldn't stop looking at the baby in her arms. Her son. A child that had been conceived out of love and was now a part of a very special family. He was perfect and Olivia was beaming when his proud surrogate grandfather arrived at the hospital to see his namesake for the first time. She had managed to get about two hours of sleep and it was already morning again. Elliot had taken Kathy home after a while the evening before and had promised to be back first thing in the morning, probably with one or more of the other kids.

But first, Donald Cragen was allowed to hold his surrogate grandson. All his objections against the arrangement of his two finest detectives seemed to have melted away, and he cooed happily with little Donald Benson. Olivia was relieved it was finally over. Most of her aches and pains had disappeared instantly after the delivery and she was more than ready to be a mother. When little Donny started squirming and frowning a bit, she knew he was hungry. She could already read her son's little habits and after Cragen had handed her little bundle of joy back to her, she started nursing him as if she had done it thousands of times before.

"Nursing makes me drowsy," she warned Cragen, "so if I start to nod off, please don't take it personally."

Cragen smiled, looking at Olivia in awe. She'd become a mother instantly and was so comfortable with her baby. He really missed her at work and was considering Elliot's offer to transfer out very seriously. Only he didn't want to lose him either. They were both so valuable for their special unit and looking at Olivia now, he wondered what the harm actually was to have two detectives in his unit who lived in a loving arrangement that all parties involved were happy with. He'd seen her with Kathy and it was amazing to watch. He'd never understand their need to share each other but he couldn't deny that they had something very unique, that truly wasn't anyone's business but their own.

Olivia noticed that Cragen was deep in thought and once she had finished feeding Donny and had handed her son back to Cragen to burp him, she decided to ask what was on his mind. Cragen looked down while patting Donny's back, debating what to tell Olivia at this point, but he decided he didn't want to distract her from these happy first hours with her baby. So he just told her that he was very happy for her, Elliot and Kathy, that things were working out so well for them.

"Thank you sir, that means a lot," Olivia said sincerely.

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It was good to have everyone back home. Olivia was resting comfortably in the master bedroom and both little babies were in their cribs in the nursery. Elliot was making dinner for everyone while Kathy was sitting at the dinner table with her laptop. The twins were doing their homework quietly upstairs - and were probably sneaking into the nursery every now and then to look at their sleeping brothers - and Kathleen wasn't home yet from hanging out at the mall with a few friends.

"Hey El," Kathy called out. "I found something interesting."

Elliot turned down the gas and walked up to his wife. He put a hand on her back and rubbed it gently while taking a look at the laptop screen.

"What is it?" he asked her, and when he noticed what she'd been doing on line, he chuckled.

"Seriously Kath? How to have sex right after giving birth?"

Kathy looked up at him with a grin.

"Yeah. It's been almost four weeks for me El."

"But only five days for Liv."

"I know. That's why I'm looking."

Elliot shook his head, but he had to admit he missed his girls, a lot. Kathy had given him a few blow jobs since Oliver's birth but that had been about it. They couldn't even touch Olivia right now, she was just too sensitive all over. And she was completely focused on Donny. She needed some time to adjust to motherhood and the responsibility for another life, so even if he and Kathy managed to find a way to please each other again, they would need to be quiet for Olivia's sake. She was always on high alert for any sounds of discomfort from her son. Their son. Elliot was so proud to have made a life with Olivia. Donny had a full head of dark hair, and he hoped that his eyes would soon turn brown like Olivia's.

Oliver's eyes were already getting lighter and he was the spitting image of his siblings. Donny was truly unique, the only one with a different mother. He wondered if Olivia wanted more kids, and he hoped she did. He'd love to have a mini-Olivia running around the house.

"How 'bout this?" Kathy asked, pulling him out of his reverie.

She pointed at an animation of a sex position and something stirred inside him. He really longed to have real sex again and could hardly wait for both his ladies to be back in the game. And Kathy was up for it already.

"He's taking her in the ass," Kathy explained.

"I can see that honey," Elliot said, leaning over to kiss Kathy's neck.

"You know, because I still have some bleeding …"

"I know, I know," he interrupted her.

Kathy reached up behind her to wrap a hand around his neck and pull him down so she could kiss his cheek.

"I'm sorry babe. But you know it'll be over soon. And I got my tubes tied so no worries anymore about getting pregnant."

Elliot wrapped his hands around Kathy's waist from behind and moved them up slowly until he was cupping her breasts. She was still nursing but she wasn't nearly as sensitive as Olivia, who was doing it all for the first time. Kathy moaned softly and he let his thumbs glide over her nipples.

"When is Oliver's next feeding?" he asked her, his lips skimming her ear, and Kathy shivered.

"Won't be for another hour," she replied softly, clearly affected by her husband's touch.

"And Donny's?"

"I don't know. About the same I think. But we shouldn't disturb Olivia."

Kathy could tell that Elliot was actually considering having some fun with her and felt a pang of arousal in her lower half. She might still be losing some blood, but that didn't mean she didn't have urges. She was almost back to normal between her legs, only needing a tampon these days, but she knew she could come from a good fuck from behind as well.

"We can't go upstairs," Elliot growled in her ear and Kathy giggled at his sudden impatience.

It felt so good to have his hands on her body, but where to go to take things further? The whole family was upstairs and Kathleen could come home any minute. It made it a little more exciting but they didn't want to upset Kathleen by having her walk in on them with Elliot's penis up Kathy's ass.

"Maybe we can go to the shed," Kathy suggested, and Elliot was game.

"Let me grab a few condoms and I'll meet you there," he said quickly.

Kathy chuckled.

"A few condoms?"

Elliot grinned and wiggled his eyebrows, then walked off to get the condoms. Kathy shook her head but then hurried outside and to the shed. She had just finished laying a few lawn chair cushions on the floor when Elliot joined her.

"No need to get up," he said when he saw her on all fours and Kathy wiggled her ass at him, looking at him over her shoulder.

"Wasn't planning to."

Elliot kneeled behind her and rubbed her hips and ass gently. His wife had filled out a little during the pregnancy and he liked her new curves. He hoped she'd stay this way forever. He lifted her skirt and then tugged down her panties without any introduction. He knew she was more than ready for some action after four weeks of forced celibacy.

"You want me to …" Kathy started, but he interrupted her immediately.

"No need. I'm ready to blow any minute as it is."

He knew if Kathy put her mouth on him now, while he was excited to be with her again at last, he wouldn't even make it inside her tight ass. He unzipped his pants and dropped his pants and boxers just far enough so he could take his cock out. This was going to be a quick fuck and they both knew it. He put on a condom quickly and used plenty of lube on himself as well as his wife to make sure he wouldn't hurt her.

"Do it baby, I need it," Kathy croaked, and she moaned loudly when he started rubbing her hole with his thumb.

"You got a tampon in baby?" he asked her and when she nodded, he moved his other hand around her to rub her clit softly.

"O God, I could come right now," Kathy sighed, and Elliot got into position.

He pushed into her slowly, since it had been a while for her, and stopped fondling her clit for a minute so she wouldn't orgasm too soon. Kathy groaned again and he wanted to ask her if he was hurting her, but she dropped her head between her shoulders and sighed while exhaling,

"So good, so gooooood!"

Elliot gripped Kathy's hip with one hand and brought his other hand back to her clit while starting to move. He was trying to go slow and be careful, but there was no way he could hold back. He loved how tight she was around him and he'd missed it so much to be buried to the hilt inside one of his girls. Kathy was egging him on and he knew it wouldn't be long. He had to hold on to her hips with both hands to go faster and slammed into her harder, going deeper, and Kathy just kept saying yes, yes yes! Her name was on his lips when he felt himself starting to go over the edge and he loved how much he loved being with Kathy again. An intense wave of pleasure hit him and he cried out as he came, continuing to pound into Kathy until she'd join him in his bliss. It didn't take long and when he swiped his thumb over her clit once more, Kathy cried out as well, her body shaking from the long-awaited orgasm she had craved so much. It had been hard and fast but they'd needed it. They would always need it and when Elliot pulled Kathy up until her back rested against his chest, she closed her eyes, a warm feeling of belonging and happiness enveloping her. Olivia and the children might be the center of their world, but they would always need each other as well.

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For those who have been waiting for the spinoff with Trevor: I had already written two chapters that picked up from when Kathy left him at the bar, but kept thinking those big bellies are in the way. So I hope you don't mind that I decided to take the foursome concept in a slightly different direction.

The first chapter is up already, and it's called "Swingers". It will be a shorter story than this one, and it will include Elliot, Olivia and Trevor for sure. I hope you will check it out, and that you will let me know if you want Kathy in the mix or possibly another SVU lady? It doesn't really matter to me, but since Mrs. Stabler didn't exactly have the sexiest appearance on the show, maybe you'd prefer someone else? It can also be an other character (OC), not from SVU. The ideas are already in my head and trying to get out, but I plan to wrap this threesome up soon as well with some nice threesome loving of course.

Second chapter of Swingers will be up as soon as you all have let me know who the second lady should be. Majority will decide but my own vote will count double :)