Transmigrated into an 80s Pretty Widow, Remarrying the Military Officer Brother-in-Law

This novel features transmigration, double purity, a sweet, pure-yet-seductive socially anxious beauty versus a deep-minded, outwardly warm but inwardly cold military officer. It's a sweet, doting romance set in an older era, focusing on a sister-in-law vs. brother-in-law relationship with an 8-year age gap.

Tang Huan transmigrated to become a young widow whose husband died shortly after their marriage. It didn't matter that her husband was gone; her in-laws treated her like their own daughter. Her father-in-law frequently slipped her money, and her mother-in-law was an exceptional cook. Tang Huan's life couldn't have been better, with the only dissatisfaction being her brother-in-law, who suddenly transferred back to this military region. What did he mean by taking her along when he went on blind dates? And when she went on blind dates, why did he follow her?!

The female lead is simple and cute, pure-yet-seductive without realizing it, not a silly sweet girl, and will call for help if bullied. The author enjoys the trope of a "little white rabbit" being slowly lured home by an "older man." Those who mind, please do not enter.