Chounan no Tsuma: Tamanokoshi ni wa Ura ga Aru

Anzusa married Takafumi Kisaragi, the eldest son of a prominent family in the countryside. It was supposed to be a happy marriage with a kind man, but her mother-in-law's attitude towards her changes for the worse when they still don't have any children after three years…! (Source: Shogakukan, translated)