To Sir, Without Love: I'm Divorcing You I, Part 2 (light novel)

Byletta fully intended to divorce her husband, Arnald, until he suggested an absurd wager. If he can give her a child within one month, they’ll stay together. The clock is ticking as Byletta wavers between love and distrust for her husband. While the pair await the results, a military coup erupts, and word among the soldiers is that Arnald is the ringleader. Byletta, framed as a femme fatale, and the aloof Arnald, who has never loved before. What will be the next twist in their love story?!