Final Fantasy VII, Zack/Cloud/Tifa/Aeris, sharing a house (and bed!)
When Tifa wakes up, Cloud aborts her sitting up with a heavy arm over her hips. "Don' go anywhere," he murmurs into her hair, pulling her back down into the sheets. "Y'r comfy."
Tifa wiggles and laughs softly, snugging back up against the hard-soft planes of Cloud's sleep-relaxed body. It's Saturday, anyway, with nothing but the whole gloriously empty day ahead of them. She kisses his throat and smiles when he shifts, more awake. "Comfy, huh?" she asks quietly, aware of the other two sleeping forms in the oversized bed. "Wasn't that you last night, bitching about my bony elbows?"
"Mmhm." He shifts again, rolling over with her until she's on top, sprawled bonelessly across his chest. "Bony elbows and all." His voice is lazy but his hands mean business, sliding down her back to cup her butt firmly. He pulls her up and leans up to kiss her properly, slow and slightly clumsy in a way she suspect's he'll always be, not quite familiar in his body no matter how many years pass. She kisses him back and drops her hand down to find his cock, half-hard against her thigh.
Cloud moans behind clamped lips, and his hands slide inward to return the favor. His fingertips press against her clit in slow circles, more comfortable with her response to his touch than his own to hers. Tifa shakes, biting her lip to keep from making noise, and she doesn't notice anything around them until she realizes there are too many fingers between her thighs.
Tifa's eyes fly open (when had they shut?) and Aeris is watching her from the crook of Zack's elbow, her breasts pressed temptingly against his arm as she leans over to press her hand between Tifa's legs along with Cloud's. Tifa moans openly, counterpointed by Cloud, and the hand she has on Cloud's cock is joined by another, fingers small and sure.
Zack is watching her, too, his eyes hooded and his trapped hand easing down Aeris' stomach. Aeris kisses Tifa's hip and then Cloud is lifting her by the hips and sliding just right and oh, yes, yes, yes. Tifa eases down on his cock, rocking in little bumps, and Cloud watches her ride with something like devotion until Zack steals his lips and attention. A little breathy moan filters up and Tifa watches Zack slide into Aeris, smooth as silk, and Aeris holds onto Tifa's hand like a lifeline.
There's another shift, a little shuffle, and it's Aeris kissing Cloud now, and they're so sweet to watch like that. Zack's hands are on Tifa while he makes love to Aeris, and Cloud has one thumb on Tifa's clit and the other hand at where Aeris and Zack are joined, and Tifa's somewhat sure that her hands on Cloud's shoulders are the only thing keeping them all from falling into a pile of limbs and sweat.
It's impossible to tell who comes first; maybe it's Cloud, when Zack reaches under Tifa to cup his testicles. Maybe it's Aeris, when Tifa finds a stable enough position to lean down and join in the kiss. Maybe it's all of them at once, but however it happens, it happens, and they curse and shake and milk out the last few bits of pleasure together before arms give out and bodies fall and Tifa's pretty sure she elbows Zack in the ribs when she tries to avoid headbutting Aeris on the way down, but she get's someone's knee in the thigh and it's all compensation.
A huge, custom made bed, and they're all tangled into an area the size of a loveseat, arms and legs everywhere. Tifa rests her head against Cloud's arm and toys with Aeris' hair, perfectly content to spend the rest of the day not moving, despite Zack's weight over her leg and Aeris' hip bone socked up against her thigh.
And then Aeris smiles upside-down at her. "How do pancakes sound?" she suggests, and all of a sudden, there's a race for the door.