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My two wives were rather angry over my last decisions, but can you blame me? The reason why I cannot easily bring them outside are actually a crap ton, I am worried about them but also about the other summons and the humans in here, bringing them outside is dangerous, it already took me a lot of courage.
There are reasons that I had considered here for all this time, but the first of them regarding Anna and Kireina is that I couldn't bring them outside because they're weakened, after giving birth, they ended rather weakened because they transferred a massive chunk of their power to our daughters, although they're recovering this power steadily, they spent a long time pregnant, so their skills and techniques were growing rusty, and now they need to practice some more to get back up.
Check "The Protagnist's Sister Is Actually the Strongest"!