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"Rias-sama, would you please get off of Sirzechs-sama? If someone were to catch you two like this it would be seen as improper considering both of your status." Grayfia warned her sister-in-law.

"Nope, don't wanna." Rias denied.

Rolling her eyes, Grayfia continued. "Please don't act childish Rias-sama."

"Why shouldn't I? I'm still regarded as an infant compared to older Devils and other supernatural beings. It's only right that I act my age at times." Rias childishly stuck her tongue out at Grayfia while tightening her hug on her brother. 

"Be as that may be, please consider the fact that you are currently hurting Sirzechs-sama." Grayfia pointed out, seeing her husband's current condition.

Rias looked to see Sirzechs struggling to breathe due to how strongly she's hugging him. She can even hear and feel the bones in his back creaking, as if they were about to snap. Technically thanks to Rias he doesn't need air to survive, it's just a habit to still breathe normally on a subconscious level. 

The slime hybrid has to admit it's pretty funny seeing her brother actually tapping out, when he can easily use his thought communication skill to tell her to let him go.

"I highly doubt I'm actually hurting him." Rias retorted playfully.

"Rias-sama…" Grayfia's tone carried a hint of seriousness.

Rias released her hold on her brother. "Ok, ok I was only messing around, Grayfia." She stood up and stepped back a bit to give Sirzechs some room to stand up.

Then she turned to face her beloved sister-in-law, knowing Rias since she was born, Grayfia instantly knew what the younger woman was about to do. "Rias-sama don-!" Sadly it was too late, she couldn't have avoided this even if she tried.

GRAYFIIIAAAAA!!!" Rias gave the silver-haired maid the same kind of hug she gave her brother. Thankfully she did not tackle Grayfia to the ground. 

All Grayfia could do is hug Rias in return while dealing with her bones potentially breaking. "Yes, I missed you too Rias-sama." 

Dusting himself off, Sirzechs want their interaction in amusement. It always makes him laugh at how easily his sister can get Grayfia to act outside of her maid persona. Even he, her own husband, cannot get Grayfia to break her maid character in public like his sister. 

"So what brings you here anyways Rias?" He asked his chaotic sister.

"Nothing much, just wanted to visit." She finally stopped hugging Grayfia. "I could never get enough of hugging you Grayfia, my brother doesn't truly get how lucky he is to have you as his wife." Rias smiled, using her magic to fix the wrinkles she caused in Grayfia's maid uniform.

"I'm well aware and thank you Rias-sama." Grayfia also smiled.

"Oi, oi Rias! Are you hitting on my wife?" Sirzechs asked her in a playful tone.

Rias rolled her eyes. "No I'm just stating facts, I would never NTR you big bro." She felt disgusted at the thought of ruining her brother's marriage. 

Don't get her wrong, if Grayfia wasn't her brother's wife then Rias would be having her way with Grayfia's amazing figure every day.

"I know, too bad the same can't be said about father." Sirzechs said.

Rias palmed her forehead in exasperation. "Oh come on! I didn't NTR him! Mother came onto me and the two of them came to an agreement! It's not my fault father has to make up with some of his harem members for neglecting them!" She complained.

Both Sirzechs and Grayfia rolled their eyes, their eyes showed that they weren't giving Rias a pass on this.

"You're not blameless either, I vividly remember times where you were extra clingy with mother, wanting her to keep breastfeeding you throughout the years. Always cuddling your face into her chest not to mention the amount of times I caught you eyeing her down as if you had chosen her as a future mate of yours. Hell, you pretty much did the same with grandma! Grayfia told me how you would all take baths together and you would have both mother and grandmother in your arms! It's like you were blatantly telling father you're not only after his wife but his mother as well. Am I lying to her, Grayfia?" Sirzechs asked his wife for confirmation. 

"No, your words are definitely correct my lord." Grayfia backed up her husband. 

Rias had the decency to blush in slight embarrassment, she looked away from their gaze. "Ok I'll admit that I am guilty of that, but in my defense it's not easy dealing with the combined urges of a Devil and True Dragon as a child. It did not help that I have a huge preference for milfs. Mother and Grandmother are just too irresistible, especially when they like to tag team me!" 

"Regardless my cute little sister, it's hard to believe you grew up to be such a debauched woman. Never imagined back then you'd be the incest type. But I'm not judging, as long as everyone is happy then that's all that matters." Sirzechs shrugged. 

"Trust me, I'm very happy." Rias smirked.

"Anyways, let's talk about this Youkai project of yours. I know the alliance between us is officialized, but are you sure this isn't going to backfire?" Sirzechs asked in a serious tone.

"I'm 1000% sure big bro, Yasaka already sees me as her mate and Kunou after some time won't be far off from doing the same. I greatly care about them both as well and Nurarihyon won't oppose us at all as long as we keep our end of the agreement. I already told you that the Youkai faction can be just as great if not a greater ally to us than Heaven or Grigori. The Devil Faction would be foolish to pass up on an opportunity to be close to a faction containing potential Sages. They just have to be nurtured properly." Rias replied. 

Sirzechs sighed. "It's not that I think your plan will fail Ria-tan, I'm just a bit worried of the backlash of the Shinto Pantheon once they learn we are the reason the Youkais no longer need them."

The Chaos Creator scoffed. "Please, if those pathetic gods have any problems I'll handle it. The main reason I told Yasaka and Nurarihyon to cut ties with them is so I can have a legit reason to bring chaos upon them." She chuckled.

"…" Sirzechs looked at his wife. "Grayfia-chan, why is my precious little sister such a bully?" He complained. 

"I wish I had a proper answer to give you Sirzechs-sama…" Grayfia truly wished she could understand why her sister-in-law is a bully. 

It makes her feel pity for the Shinto Gods for being the unfortunate target of her chaotic yet lovable sister-in-law.