The Duchess Returns in Glory

"Dr. Serafina, a 21st-century medical doctor, was betrayed by her stepsister and boyfriend. Caught in an explosion, she reincarnated in the Middle Ages as the bullied fat duchess to Duke Brad, with two lovely children. Her space storage ring came along with her. With modern tech from the ring, she transformed herself, punished the wicked Lisa, and started a hilarious romance with Duke Brad—all thanks to their cute kids. Amid tangled royal power struggles, they joined hands to uncover the shocking secret behind his poisoning."