Pirates, but with a Mom Simulator

[I ran out of ideas for the Little Sister Simulator, so I changed it. I'm very sorry. Anyone who bookmarked the previous one is free to remove it.] * They say mother is the opposite of adventure. But at a friend's invitation, Shafiel started playing a challenge game, where she had to play the "mother" of many characters she wasn't related to. ...But why did she end up living with the kids as she played?! [First Playthrough: Before Becoming a Legend] Young Edward Newgate had a secret. He'd picked up a strange woman, and she claimed to be his "mother." "The childhood of a legendary figure is always extraordinary." "Mother" smiled and ruffled Edward's hair as he declared that he would become a pirate. "But before you become a legend, Edward, you're Mother's child." [Second Playthrough: The Eternal Kingdom] People's dreams never stop, and neither do Linlin's. She would befriend the giants, have children, defeat Roger and all her other rivals, and build Totto Land! And "Mother" was always the first to support and join her. "The Big Mom Pirates will always yearn, always hunger. Empress Linlin will always be greedy, never satisfied." "Let's build the 'Eternal Kingdom' together, Linlin." [Third Playthrough: The Day the Sun Never Set] On the day the laboratory was destroyed, King remembered two things most vividly: First, the future captain's rage. Second, the tears of the fellow Lunarian who called herself "Mother." Kaido was the lord of Onigashima, and King was his right hand. And she was the "Mother" of every pirate on Onigashima. "We don't need Nika. You're the sun for all of us, Kaido." [Fourth Playthrough: The Book of Great Deeds] On the day the God Valley battle ended, "Mother" picked up many children. Shamrock was one of them. And "Mother" said that Shamrock had a younger brother who'd gone missing. Later, they found the younger brother. And he even came with a new little brother with a red nose! Shamrock was so angry his nose was practically crooked! But "Mother" laughed and hugged him and his new brother together. "You're both Mother's most beloved children." "You can build a new era together." Fifth playthrough, sixth playthrough, seventh playthrough... Shafiel played for a very, very long time. At last, her friend told her that she only had one final stage left. If she cleared the last level, she'd get the grand prize and every reward! Shafiel happily opened the game, only to realize something was wrong. She had transmigrated! The shadow standing beside the throne looked at her. "You're back, 'Mother.'" Shafiel: "..." Transmigrating into the game was one thing, but what was she supposed to do when the game's final boss, whom she'd fought, scolded, and mocked, had become her stepchild? Help wanted, urgently!!! And she had no idea that, out at sea, all the children she'd raised had remembered. They'd had a "Mother" all along. So. Where was "Mother" now? * She was the dragon's treasure, the emperor's only one. Her presence made the mad Eden a dreamlike, tender place. She was a big sister, family, a mother. And later, she was also ▇▇▇. [Welcome to the Grand Line, paradise for adventurers, sacred ground for outlaws, and the dreamland of every pirate.] [But remember the first rule of survival.] [Do not disturb "Mother."] Content Warnings: 1. The story uses a playthrough format. The heroine and the children are not blood relatives, and both sides know this. They also have no legal family relationship. Some playthroughs have a male lead and some don't, and in some playthroughs the pairing is with one of the children themselves (except adopted daughters). If this is a dealbreaker, it's obvious from the title and blurb. The author's extreme kinks are on full display. 2. The heroine is a gentle, saintly, homemaker-type big sister with a Lawful alignment. She's strong in some playthroughs and weak in others. The story doesn't focus on fighting, so readers who care about high combat power should keep that in mind. 3. Once again, if this is a dealbreaker for you, do not read it. Theme: Build healthy family relationships