Yome Shuto Senso in Isekai! (Regina Books) [Light Novel]

[Machine Translation] Sae, an office worker at a black company, is suddenly transported to another world by a mage named Clave. She marries him after various events and enjoys a happy newlywed life with her husband's love and affection. However, she has a nemesis. She lives with her mother-in-law, Leilia, a beautiful witch. The two women, who have recognized each other as enemies at first sight, are engaged in a battle over whether they are on good terms or not. One day, while Sae was fighting with her mother-in-law as usual, a boy appears in front of her, claiming to be Crave's child. Sue was in turmoil, wondering if he was cheating on her. Sae was in turmoil, but the more she listened to the boy's story, the stranger things became.... Sae and her mother-in-law decide to go to the boy's mother to find out what is going on...?

ブラック企業に勤めていたOLのサエは突然、魔導師・クレイヴによって異世界に連れていかれる。様々な出来事を経て彼と結婚した彼女は、夫の愛情をたっぷり受け、幸せ新婚生活を送っていた。だが、彼女には宿敵が存在する。それは、同居の姑にして美魔女のレイリア。一目で互いを敵認定した彼女達は、何かにつけて仲がいいのか悪いのかよくわからない攻防を繰り広げていた。そんなある日、いつも通りに姑と戦っていたサエの前に、クレイヴの子どもだと主張する少年が現れる。すわ、浮気か!と大混乱のサエだったが、話を聞けば聞くほど、おかしいことばかり...これはこの子の母親に直接確かめるしかない、とサエは姑と共に相手のもとに乗り込むことにして―!?