A / N: I don't know much about Tensura, and I'm writing this just for fun, so don't expect too much for now.
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After Milim calmed down, the four of them talked to each other calmly, while Milim was still hugging Tiamat, enjoying her breasts like pillows.
"Oh man, I'm glad Tia arrived, otherwise things were going to get really ugly." Guy commented as he massaged her shoulder.
Tiamat glared at him. "Rougue...I am...Mother...Call me."
Tiamat tried very hard to speak coherently, but she wasn't used to using her throat to speak. She has always talked telepathically, a custom created when traveling with Veldanava.
Guy turned his face in irritation, and replied, "Look, we've discussed this several times. I will not call you mother."
Tiamat was not offended, she simply tilted her head, and said in an amused tone, "Rougue...Tsun-Tsun?"
Ramiris giggled. "Yes, he really does look like a tsun-tsun, dear mother."
Tiamat smiled brightly when she heard Ramiris calling her mother. She loved having others call her mother, and she always insisted that the people she loved as her children should call her that. Among them all, the only ones who don't call her mom are Guy Crimson, and Dino.
Guy loved Tiamat, for even as a demon, and even in his original form, which would make any human die of terror, Tiamat always treated him with love and affection. However, Guy is really arrogant, he would never go so far as to call Tiamat his mother, because Tiamat is not truly his mother, but his superior.
Dino on the other hand was just too lazy; so lazy that he was irritated by Tiamat's constant motherly clinging.
Milim, who was hugging Tiamat comfortably, lifted her face between Tiamat's breasts and asked, "Mommy, what is a Tsun-Tsun?"
"Tsun-Tsun...Hard on the outside...Soft on the inside," Tiamat replied. As a once-human and Otaku, Tiamat naturally spread some of her cult knowledge like expressions and dialects among her loved ones.
Milim seemed to get it wrong because she immediately turned to Guy with a mocking smile.
After that, it happened as in the original work, with Guy proposing to create a Demon Lord alliance. His reason was that in the future, there would be more Demon Lords and that the alliance would keep them in line. However, Tiamat knows that he is simply drooling over Ultimate Skills, as an individual develops one when evolving into a True Demon Lord.
Seeing the outcome of the day, Tiamat was very happy, as she did something she thought was not possible; change fate. In this battle, Ramiris should have been the one who mediates the battle between Milim and Guy and bring Milim back to sanity, at the price of absorbing so much demonic and dragon energy that she would have to maintain a resurrection cycle indefinitely.
However, as it was Tiamat who stopped Milim, this did not happen. Her daughter would not have to undergo death and reincarnation indefinitely, and that made her very happy.
As Ramiris had not become a Corrupt Elemental, only Milim was invited by Guy. Milim agreed, on the condition that there were no restrictions imposed on her and that Tiamat could also participate.
Guy didn't see a problem with Milim's conditions, as he doesn't really care what she does as long as she doesn't go overboard, and there was no problem with Tiamat's participation given who she is. However, Tiamat would not participate as a member, but as a guest.
Ramiris looked interested but didn't say anything and just left after saying goodbye to Tiamat. Guy informed Milim that he would organize everything about the 'Demon Lords alliance', and would call her when there were more Demon Lords, and then he also left.
In the desolate and destroyed place, only Tiamat and Milim remained.
''How are you...Feeling...SweetHeart?" Tiamat asked, still worried about Milim.
Milim buried her face between Tiamat's breasts again, and murmured, "I'm not fine, but I will be."
Tiamat sighed. She should have been more attentive to what was going on. She didn't expect Gaia to die even with her interference. Maybe she should have trapped Milim in her house forever. No, that's too extreme, and she's not like that. Painful experiences are also part of one's growth. Sooner or later Milim would have these experiences, and she wouldn't be able to protect her forever.
Tiamat cupped Milim's cheeks affectionately and lifted her head to meet her eyes.
She knows that almost nothing in the world could harm Milim, but there are things out of that world, that both she and Veldanava have had trouble facing and banishing. The multiverse wasn't as dead as she'd imagined at the time.
"I pruowmish."
Tiamat released Milim's cheeks and smiled. That promise was all she needed. She doesn't care if the story goes the same as in the anime, as long as Milim and her other children are safe, she will be at peace.
Looking at Milim, who still looked grieving over Gaia's death, Tiamat knew Milim needed some time alone. Not only was Gaia murdered, but he ended up revived as a Chaos Dragon, and Milim had to slay him. This was the catalyst for Milim's fury.
Tiamat affectionately caressed Milim for a little longer, and then left, letting Milim have some alone time, but not before showering her with kisses.
Tiamat teleported to her home with her mind full of thoughts. She didn't know what to do for now. She didn't want to interfere in her children's lives, as that would make them find her irritating, but she didn't want to sit still either. The world's system also works perfectly without her, so she had no job to do.
Sometimes she hated that Veldanava had made such a perfect system.
She could go back to pretending to be human and explore the world, but she didn't like the experience. The food was horrible, as well as the forms of entertainment were terrible for her, who once lived in a modern society in which entertainment was evolving every day.
Tiamat could also go to another universo, as she had never used the ability that she gained with her wish, but she doesn't know how the time dilation issue between universes would work, and she didn't want to travel without first meeting Rimuru.
She really wants to meet the little, cute slime.
Considering her options once more, she decided to sleep, which is something she hasn't done since becoming a deity. She sealed and hid her home from the outside world in a small pocket dimension, and lay down to sleep. She planned to sleep until Rimuru appears and builds Tempest, and then she can have a good time before traveling to another universe.