My Daughter and the Neighbor’s Daughter Look like Sisters – I Thought My Husband Was Cheating, but the Truth Was Much Worse

New neighbors moved in, and their daughter looked eerily like mine.

Suspecting my husband of an affair, I confronted him, only to discover a darker family secret: the girls weren’t connected by infidelity but by blood—my husband’s estranged sister, who had recently passed, was the mother of our neighbor’s child.