"There's still a few hours until the meeting. Sirzechs was kind enough to send Grayfia ahead to prepare things upon her recommendation, so you have until he arrives to learn from the best. Good luck."
And like that, Issei leans back and leaves everything in Grayfia's capable hands. The silver-haired beauty immediately takes her temporary subordinates in hand and begins to walk them around the place, directing them through their duties as maids. Issei can't FULLY resist messing around, and as such, he does end up abusing the controls again more than once over the next few hours. He leaves Grayfia alone though after she ends up having to change because of just how messy her tits end up getting. That lactation of hers… it's wonderful, but also a bit noticeable at times.
In the end, when the Lucifer himself finally arrives, Grayfia has actual padding inside of her bra in order to soak up the milk dripping from her nipples for the duration of his visit. Needless to say, Issei is rather amused by that. Still, time to put his game face on and make a good first impression with the man whose sister he's enslaved and broken to his will. Not to mention the cuckolding.
Plastering a smile on his face, Issei sits at a small table as the door opens and Grayfia admits her husband to the room. Her face is only lightly flustered, and Sirzechs isn't looking at her as he enters, instead the devil, one of the Great Satans, is looking at Issei. Akeno and Tsubaki stand on the other side of the room, prim and composed as they keep their backs straight and stare straight ahead.
Sirzechs takes in the room, even as Issei stands up and holds out a hand for the other to shake.
"Lucifer. It's a pleasure to finally meet you in person."
The much older devil is taken aback for a moment, until finally his lips curl up into a pleased grin. He leans over the table between them and takes hold of Issei's hand, shaking it quite vigorously as Issei in turn does the same. The young man isn't sure if Sirzechs' putting any real strength behind the handshake, but if he is, Issei is most definitely disappointed. Admittedly, he's a bit nervous to be meeting with a Great Satan. Now though, now that he's in the other man's presence, he's quite underwhelmed. There's an aura of power around Sirzechs, but it feels more equal to Issei's own, then overwhelmingly strong.
… Has Issei truly grown that much? The acquisitions of older female devils such as Grayfia and Venelana, has it given him that much of a leg up that he's now comparable to a Great Satan? Issei doesn't truly think so, but he might almost be there. Regardless, the young man has no desire to test things. Thanks to Grayfia, Sirzechs believes that Issei's relationship with Rias is more equal than it truly is, or perhaps even slanted in his darling little sister's behavior. All Issei has to do now is make Sirzechs like him, and everything will be fine.
As they pull back from the handshake and settle into their respective seats, Sirzechs gives Issei an appraising look.
"I can already tell that you're an interesting one, Issei Hyoudou. My Rias is lucky to have snared such an exceptional servant."
Issei keeps his true feelings off his face as he smiles in return. Before he can answer, Grayfia and the two younger Queens are moving in, synced up as they place biscuits on the table, as well as a number of different additives to put in the tea that Grayfia sets down. Sugar, honey, lemon, cream, and even milk. Issei eyes it all, even as Grayfia pours for Sirzechs while Akeno does the same for Issei. It's then that he speaks up.
"I'm lucky to have found a King like Rias. She's very caring, and very giving. I love her, with all my heart."
It's not actually a lie, most of it. If Issei had been picked up by someone even stronger than Rias earlier on, he might never have gotten to where he is now, if they'd been smart enough to control his growth. And Rias was certainly both caring and giving. He did love her, just as much as he loved any of his other girls… maybe more even, given that she was his first true conquest.
Grayfia prepares Sirzechs' tea exactly the way the Lucifer likes it, even as he regards Issei in silence. The older devil doesn't need to give his wife any instructions. After all, they've been married for quite a while now.
"I'm sure you do. Not to sound too cliché, but you had better love her with all your heart. Issei Hyoudou, let's cut straight to the point, shall we?"
Sirzechs leans forward and Issei's eyes go wide as he feels a startling amount of power suddenly emanating from the other man. Ah, there it is. It's not quite as overwhelming as he'd feared it would be, but there is definitely still a power gap between him and the Great Satan as Sirzechs smiles sardonically.
"I love my baby sister Issei. I love her with all of my heart as well."
Before he can continue, Issei interrupts. Not outright, and not verbally of course… no, instead he flicks up the controls on his maids' vibrators and watches as all three of them struggle to contain their reactions. He doesn't go all the way to the max of course, but there's still more than one gasp as Sirzechs is abruptly distracted by his wife having to plant a hand on the table to catch herself, her lips parting and her tongue slipping out for all of one second.
The Lucifer looks to Grayfia with some concern.
"Darling? Are you alright?"
The silver-haired devil immediately straightens up and glares at her husband.
"I'm fine. Terms of endearment are not appropriate right now my Lord. I am acting in my capacity as your maid and your Queen, after all."
Sirzechs laughs at that and waves her admonishment off, but the exchange has already done the expected damage. The mood is broken and his little attempt at intimidation ends as the Great Satan looks to Issei with a grin, clearly expecting the young man to commiserate with him. Issei does so, easily.
"I see where Rias gets it from…"
That gets the expected grin from Sirzechs and he nods happily, hearing what he wants to hear from the young man 'dating' his little sister.
"Oh yes, my Rias grew up quite enamored with Grayfia. Of course, she could never be a maid like my darling wi-Queen!"
Grayfia's hand smacks into the back of Sirzechs' head as he's in the middle of calling her his wife, and he hastily corrects to Queen, even as Issei pretends to hide his amusement at the married couple behind a sip of his tea. He very nearly spits out the liquid when it slips past his lips and onto his tongue, not because of the heat, but because of just how sweet it is.
Just barely managing to regulate his reaction, Issei shoots Akeno an irritated look as the young devil moves back to her place at Tsubaki's side, not looking his direction, but smiling ever so slightly all the same. Oh, she was definitely going to get it later for that little trick. Hell, why wait until later?
Issei turns up the controls on the vibrators for all three women and enjoys the way they all struggle to keep their calm. Sirzechs notices again, because he'd be a fool not to. He frowns as he watches his wife and the two young devils attending to them grow more and more flustered.
"Grayfia…"
To her credit, the silver-haired maid is quick to offer a rebuttal.
"They are simply nervous my Lord. Being in the presence of a Great Satan will do that."
Sirzechs doesn't look entirely convinced, but eventually he does turn his attention back to Issei. The two continue to chat about Rias and other things. The Rating Game against Riser comes up and Issei genuflects as Sirzechs praises him for coming through for his little sister, as well as acquiring for her, two new powerful servants in the form of Yubelluna and Ravel.
As they continue to talk about this and that, Issei feels like he's doing quite well. And of course, if he ever stumbles, the controls tied to his pets' vibrators helps to distract Sirzechs away from him for a split second as he collects himself. Each of the maids is forced through at least one orgasm in the time that follows, but to their credit, each of them manages to hide the fact that they're climaxing right there in front of a Great Satan.
Issei honestly can't believe the other man can't smell the scent of sex that's now permeating the room. Feminine arousal fills Issei's nostrils and it's all the draconic young man can do to avoid leaping up and bending over one of the beauties standing around him and Sirzechs for a good fucking, right then and there. But then, perhaps that's the point. Perhaps it's the dragon in him that's letting him sniff out the arousal of his three bitches.
When Grayfia suddenly clears her throat a half hour later, Sirzechs looks to her and the beautiful Queen looks over at the clock hanging on the wall. The Great Satan's eyes track to where she's looking and then widen as he abruptly stands up.
"Ah, this has been fun Issei, and I'm glad to see my Grayfia was right about your character. You're quite the young man, and I know I can trust you to keep my little sister safe and treat her right. Unfortunately, I and my Queen must be off now. The work of Lucifer is never done it seems."
Issei smiles and nods in understanding, even as he slides the controls on Grayfia's toys in particular up and down a few times. The silver-haired maid stiffens and shudders as a mini-orgasm wracks her body, and then she speaks up, getting the message from her Master loud and clear.
"Actually, my Lord, I would prefer to remain behind for a time. I need to have a talk with my fellow maids, about the many slip ups they both made during this tea serving."
Akeno and Tsubaki both blanch at that and Sirzechs gives them pitying looks before grinning at Issei and tossing him a casual salute. Then the laidback Great Satan is gone, a bit of teleportation magic taking him away as fast as he'd arrived. Issei stares at the spot where he'd been stood for a moment more, even as Akeno and Tsubaki collapse to their knees in relief, both orgasming yet again right then and there.
Grayfia is a bit more composed as she holds herself up with the table and takes deep, calming breaths. Issei responds by upping the controls to max again, and she lets out a squeal, her legs shaking and spasming from the resulting orgasm, yet not completely giving out on her. Pleased with her performance, the young man reaches over and pulls Grayfia into his lap, causing her to yelp and then moan as he begins to molest her right then and there.
As expected, his silver-haired maid is completely wet, both above and below by this point. Her bra is soaked through despite the pads, and her blouse was probably only a few minutes away from having hefty milky soaked spots seeping through it. Issei chuckles as he outright tears Grayfia's blouse apart, the buttons flying everywhere and her bra-clad chest bouncing free slightly. Her bra comes down next, releasing her lactating breasts and Issei is quick to lean in and take one of her nipples in his mouth, suckling greedily from her teat.