Sir, My Mommy's Your Wife!

Linden Barrow and Lena Wells were arranged to marry by their families without ever meeting each other. After Lena unexpectedly becomes pregnant, she raises their son, Asher Barrow, on her own. Six years later, Linden returns to the country and unknowingly rescues his own son, unaware of the truth, and mistakenly believes Lena has been unfaithful. However, as they work together, they become attracted to each other, the misunderstandings gradually clear up, and they eventually reconcile, leading to a happy life together.