Responses
If it helps I also remember that the reason why she believes the husband is in love was in the saint/empress was because of either an illusion or from the angle she was standing at made it seem as if the husband was kissing the empress/saint
Nevermind I found it if anyone is intrested it’s: https://www.mangago.zone/read-manga/i_m_a_villainess_but_i_became_a_mother/
It’s set as an average historical isekai. However the couple is already established at the beginning of the story. The story surrounds the misunderstanding that the mc has that her husband is in love with the empress or saint (I can’t remember) . But in reality the husband has no such feelings in fact it’s just the empress/saint who is deeply in love with the male lead that she wants to break them up. There’s a scene where the mc escapes by train and is stopped by the ml. The scene ends with the mc asks her maid or whoever was with her to seal the train doors using some sort of magic. And the mc tells him that she’s leaving him and he’s free to be with the empress/saint.