I think I need to give a bit of a timeline.
Yusuke, Hiei, and Kurama leave like usual in the series. When Kurama's mother is supposed to be married, instead she and her fiancée die, tragic accident. Shizuru got knocked up by Sakyou at the Dark tournament, has a baby 9 months later and dies during. Kuwabara gets Sayuri (14 in story). Two years later Kuwabara finds the Hiei look alike who was already three (So he's 15 in the story). Three years after that, Yukina gives birth to her first immaculately conceived child (Hasn't shown up In the story yet, but she'll be 9), Hiei of course has shown up to be there for her and come clean about the brother thing. Finally, Keiko decides she wants to give birth to their next child and asks Kuwabara to be the father; this is the Kuwabara look alike (he's three, almost four). Confused? You better be. Yusuke'll sure be~
"Haven't seen you in years and the first thing you tell me is you and speedy Gonzales fucked and had a kid?" Yusuke said, green in the face. "That's sick. Real sick."
Kurama stood next to Yusuke in embarrassment, thinking of how to carefully explain all the reasons his statement was wrong. So wrong. Fortunately, someone who could bitch slap Yusuke's mind into understanding spoke up to break the ice.
"Are you fucking retarded?" Sayuri deadpanned. Despite his general distaste for hearing his kids using such crude language, Kuwabara spluttered out a laugh at the expense of his long time friend. The offended, pissed off glare on Yusuke's face was too priceless. This was the kinda thing he missed about Yusuke; the pure silliness that sprung from the man at times.
Kurama put a hand on Yusuke's sleeve and tugged him to lean in a little. "Yusuke. Kuwabara and Hiei are both men. Two men cannot have a child together." Kurama said quietly to the confused man beside him. Just as quietly, a voice in the background said, "Who the Hell just assumes that two guys had a kid?"
Yusuke was really getting tired of everyone pissing him off and tried to defend himself. "Well I thought maybe demons could, who know, get their little guys settled in… uh." Yusuke stalled for a moment, trying to think about what he was really wanting to say.
"I think he's trying to say I put a baby in your asshole," Hiei cut in. Expecting a great burst of laughter from the orange-headed man, instead a weak hum accompanied by a flickering smile was Kuwabara's response. Everyone was reminded of Kuwabara's situation as Hiei, Sayuri, and the young boy lunged forward to support Kuwabara's swaying figure. With his daughter under one arm and his son beneath the other, Kuwabara slowly retreated back into the house and towards his room down the hall.
Hiei leaped down the three stairs and grabbed Kurama's hand to pull him towards the hobbling pack of Kuwabaras. With a pointed look at Yusuke he said, "Quit distracting everyone with your stupidity," and disappeared into the house as well, frog marching Kurama past the threshold.
Standing in the courtyard alone, Yusuke felt the pressure of being outta the loop bearing down on him. Fourteen years without bothering to know what went on in the human world and Yusuke could barely breath he'd missed so much. Sure Kuwabara or someone could retell all the more important events, but Yusuke would never be able to experience them like he would have if he'd only stayed. And the little things would just go unsaid, leaving Yusuke to guess, something he apparently overdid sometimes, on what happened in everyone's lives 90 percent of the time he was gone. His skin itched with the need to know; Yusuke was putting some serious thought on calling on Koenma to watch over the tapes he knew the little bastard kept on everyone.
"Oh, thank God! Kurama's here!" a heart achingly familiar voice cried from behind Yusuke. He spun around to see Keiko coming up the stairs. In her hands dangled a horde of plastic bags. She seemed out of breath from the long trek up the fleet of stairs, little clouds of mist puffing out with each breath in the cold breeze. Yusuke's first thought was that Keiko looked good with her cheeks flushed so red. His next was that there seemed to be a toddler gripping at the knees of her pants with one hand and holding a loaf of rumpled looking bread aloft in the other. Then Yusuke realized the kid had to be Keiko's (she was always the mothering type, he thought). Finally, Yusuke noticed the blaringly bright orange the boys hair was.
Unlike with Sayuri and the other boy (Yusuke hadn't bothered remembering a name if it was even said) this one was obviously Kuwabara's. Yusuke kept his thoughts to himself for once, trying hard not to make an ass outta himself in front of Keiko. Walking towards him, Keiko gave him a once over At this Yusuke puffed out his chest. She smiled softly, "You look good, Yusuke."
Yusuke did look good. Dressed in a simple cut outfit from demon world, it was made of fine material and fit him wonderfully. To him it was everyday clothing, to Keiko it was one of the few times she'd seen him in clothes that weren't torn or bloodied as a result of a tussle.
"So, you and Yukina," said Yusuke, following Keiko as she walked through the front door, only bothering to taking a few bags when she stumbled. Keiko smiled a truly shit eating grin, "Yeah."
Tipping his head down Yusuke looked at the kid shyly hiding behind his mother's legs, "So, you and Kuwabara?" Yusuke asked confusedly, returning his gaze to Keiko in time to see her red cheeks flare even more.
"That…That one's a long story. You have time to hear in later since you'll be staying a while." Keiko said, a bit of a hard bite at the end. Yusuke was kinda glad she was forcing him to stay; now he'd be able to nose around and hear what's been happening the past decade or so. Other than baby making, Yusuke thought with a roll of the eye that Keiko mistook as him shrugging her off. Trudging into the kitchen and placing all the grocery bags on the counter, Keiko rounded on Yusuke, backing him into a corner, while her son ran off to find his mom.
"Fourteen years," she said in a shaking voice ripe with anger.
"I know," Yusuke whispered, having already acknowledged his extreme fuck up and shouldering the guilt. "I should have come back to see you. Explain to you that I…I just can't be what we'd need me to be if we were a family."
"This isn't about us!" Keiko exploded! "I gave up on you before you said you were even gonna come back!" Keiko paused to catch her breath and to calm herself, backing away from Yusuke in disdain. Yusuke did as he'd done as a child when being yelled at, tense up in fight and look firmly at the ground.
"He is still waiting for you. After all the hard times. The struggles to get by. The deaths spent mourning for both you and the deceased. He needed you! He needed Hiei and Kurama! His friends! Instead all he had was me and the girls and a heaping pile of responsibilities that kept getting bigger."
Yusuke opened his mouth to interject. "Shut up!" Keiko hissed, truly stunning Yusuke with the amount of malice to her words. She stared him down for a minute.
"I've changed my mind. As soon as Kuwabara's better, I want you out of here. We all know you won't stay and it's not fair torturing Kuwabara with something he desperately wants but can never have."
Yusuke swallowed hard, forcing down the cries he wanted to weep at the truth of her words. He'd already planned on leaving after Kuwabara was feeling better. He felt like scum for trying to flee again, but he didn't want to end up like Kurama. Wallowing in the utterly soul crushing agony that losing a loved one brings about. Hearing of the deaths of Genkai and Shizuru stung in the very deepest parts of his heart, so much so his chest hurt with the physical resonance of it. He didn't know how'd he force himself to even breathe if he stayed and allowed himself to fully experience the deep rooted connections between himself, Keiko, and Kuwabara, only to lose them in a few years.
Keiko's words made him want to give it a shot though. For Kuwabara and Keiko, this was it. They'd only get five of six more decades before their bodies would fail them and they would, like Hiei said, "rot." But contrary to Hiei's cruel words, Yusuke knew that these two made all the difference to him and the impact of their words and actions would forever be with him. From what he'd learned so far they were also changing the lives of many others, of those who'd live on a long time and spread the same generosity shown to them by the duo.
Yusuke looked up to discovered that in his thoughts he'd drifted out of the kitchen into the hall. He listened to the sounds of Keiko putting away the food for a moment. Cautiously, Yusuke walked back into the room and cleared his throat. "If you and Kuwabara will have me, I wanna stay here for a while," Yusuke croaked out, words cracking slightly. "A long while." He added for good measure.
Keiko carefully smoothed her hands down the wet sides of the gallon of milk in front of her, back turned to the man pleading in the archway. "There's a room across from Kuwabara's you and Kurama can share."
With that she resumed with the storage of food, going on to pulling a few things back out in preparation of dinner. Yusuke smiled, turning to wander around until he found which room she'd mentioned. However, Yusuke choose the first room he came to instead. Despite the complete bareness of the room, Yusuke kneeled in the center, slowly lowering down his tired body to rest.