“Hey, did you remember to put crunchy peanut butter on the grocery list this time?” Shiro calls, voice slurred as he talks through his toothbrush. Keith pauses in washing his hair and makes a disgusted face at the shower wall, receiving no sympathy.
“No,” he answers, innocent, like a man who's never plotted to get his husband to see the light of truth by forgetting to write down and buy heathen peanut butter for the third week in a row.
Shiro snorts, just audible over the pounding shower. “How about I put it on the list for you?”
It isn't; Keith can't stand to look at that stuff or live in a world where his own son might start to enjoy it too. He already fears it’s too late.
Keith finishes rinsing his hair and reaches for the face wash. He doesn't hear Shiro move, but when he turns around, Shiro is standing in the shower, water running down his body from the overhead rainfall shower head. Keith can't help how his eyes trail down a little bit, relishing the sight. He almost forgets what they’re talking about.
“You're refusing to buy the peanut butter I like,” Shiro says, smirking in a way that should look horrible on him but just makes Keith want to go to his knees.
Keith protests, “I'm not,” a beat too late.
“God,” Shiro says, affectionate and hungry sounding. His eyes grow dark. “When was the last time we fucked in the shower?”
Knees suddenly weak, Keith raises an eyebrow in an attempt to seem unaffected. There's no way it works. “A while,” he hedges.
Shiro's arms slip around his waist and he leans down, angling for a kiss before he realizes Keith has soap all over his face and neither of them want to taste that. He plants a solid kiss on the top of Keith's head instead, holding him tight to Shiro's chest, careful and wanting, hands exploring lower.
“We could make it really recent,” Keith says, breathless. His soapy hands trail down Shiro's stomach hungrily. “So recent that we're—”
A plaintive question rises from beyond the bathroom door and everything freezes. Keith sighs, a little put out, but he pushes Shiro's arms away gently to rinse off his face and slip quickly out of the shower under the watch of Shiro’s understanding pout. He towels off as fast as he can and slips on a pair of pajama pants.
“Don't you dare leave this room,” Keith says with a threatening stab of a finger in Shiro's direction.
Tamaki is waiting just inside their bedroom, his favorite blanket trailing behind him in his tiny fist. His eyes droop but a smile tugs at at his mouth when he sees Keith, reaching out for a hug.
“What's up, kid?” Keith asks, palming a hand affectionately over the back of Tamaki’s head. “Can’t sleep already?”
“Dad said you wouldn't buy crunchy peanut butter because you don't love us.”
Fucking hell, not this. Keith stares down at him, disbelieving, and he pulls away to crouch in front of his son. “Your dad said those exact words?” he asks, tone dry as the desert.
Tamaki looks off to the side. “Well . . . not really.”
“That if I asked you would get it this time.” Tamaki widens his eyes, definitely to make himself look cuter on purpose—he’s known that worked on his parents since he was about two and a half years old, and they haven’t been able to come up with a strong defense against it.
“You like crunchy peanut butter?” Keith asks, withholding his sigh. Tamaki nods. “Well, how about you come with me tomorrow morning to the store and you can make sure I get it, okay?”
Nodding some more, Tamaki grins at him and throws his arms around Keith's shoulders. “Thank you, daddy,” he says, fast. “G’night!”
“Good night,” Keith calls after him, bemused and a little disappointed in his own parenting ethic that he clearly failed his child in such an important matter. People enjoying crunchy peanut butter in his household, what has the world come to?
Keith slinks back into the bathroom, slipping his pants off and leaving them on a heap on the floor. Drawing the shower door back, he sees Shiro’s eyes making the same all too innocent face Keith was earlier.
“You're in trouble for that stunt,” Keith says as he steps into the shower and Shiro’s arms. “You better start making it up to me.”
A sharp, unrepentant grin flashes over Shiro's face. “I can do that.”