Chapter Text
Grian found himself in his shower, figuring it would be the last time likely using this one. He was going to be moving into the master bedroom and making use of that bathroom. It would be entirely weird of him to insist on using the spare room one so Grian was going to end up having to wank in the shower that Mumbo used… Which added to everything since he still was struggling to stop thinking about the man when doing so.
At least he finally sent that text to Kevin, only to find the man had texted him first. Grian felt a little bad but it wasn’t as if this was an actual relationship he had with Mumbo. He was a colleague… he apparently shared a bed with because… well realism. Grian wondered how real Mumbo was going to demand them be?
Grian stood under the spray, hand drifting down to cup himself. Mumbo was so insistent… why wouldn’t the man just insist on taking it further… Grian in bed, lying back, just watching the man approach. “Grian… I was wondering…” He would ramble softly, looking awkward and flushed, his hands dancing a little in front of himself in nerves as he tried to communicate something. Grian gave him a moment and he was rewarded by Mumbo placing a hand on Grian’s crotch.
“Oh… what was you thinking about?” Grian could just imagine himself asking, seeing the pretty flush bloom on Mumbo’s cheeks. The way he just became so damn shy as he just stroked Grian as if Grian would let him to get away with just that. Grian loved to see the man just… stammer and blush his way through it. Hearing Mumbo, despite the big brain and posh words, just being crude… this would be good but Grian didn’t expect this…
“I was hoping… Um… for more realism… to increase our natural bond and uh…” Mumbo rambled, his hand still cupping Grian’s bulge, fingers playing over it, as if he was a distraction device… an idea Grian could get behind or rather under. “Perhaps… We could simulate… a little more of the process…”
“More of the process?” Grian asked now curious and confused. Whatever did Mumbo mean? The process of… It clicked. Grian was now the one who was flushing dark red. Surely Mumbo didn’t want to… He wasn’t actually suggesting…
Mumbo ducked his head, his lower lip caught between his teeth for a moment, making him look even more shy and fuckable. “Perhaps… If you are willing… We could… simulating the conception of Grumbot… I mean physically… Not like in the lab! I mean in a way it is an upload of data Grian… Um you know with the amount of genetic information in a single sperm cell is about 37.5MB… So, if you calculate the average number of sperm in an average size ejaculate… not that you are average in any means but your sperm load density is… I think I never actually tested it but I assume? Anyway… It should be about 15TB or 15,875GB of data in your load…”
Despite the worry about Mumbo getting him to wank into a test beaker, Grian found himself grinning. “You want me… to breed you?” Grian being a gay man never really thought about actually impregnating anyone… but the idea of Mumbo being so aroused and begging to be fucked as if he was in heat made Grian so hard.
Outside of his fantasy, his cock was already rock hard and Grian slowed his hand down to keep himself from finishing too quickly. He wanted to explore and enjoy this fantasy before the guilt and confusion set in, so Grian just teased himself and continued the sexy day dream.
Mumbo must have felt the way his cock hardened and twitch under his fingers. “Yes… Grian… I want you to breed me…” He was so red and flushed. “I… I want you to fill me up, and gosh… I want you… to cum in me… And impregnate me.” He mumbled and the shyness was making it so much hotter…
Grian reached out to cup Mumbo’s jaw, his thumb brushing over Mumbo’s lips, feeling the soft indents from Mumbo’s teeth. “Oh sweetheart… you want me to fuck a baby into you.” He whispered softly, seeing the way Mumbo’s eyes darkened. “You are just so fucking ripe, aren’t you? In heat… So fucking needy. Just ready to be bred.”
Mumbo whined softly and licked at Grian’s thumb. “All for you… Grian please…” He whimpered and climbed up onto the bed properly. “Gosh… I just need you… to breed me…”