I Played The Long Game And They Never Saw My Heir Coming

The story

Monica Hayes knows the baby in her cradle belongs to her husband and her sister. They think her real son is dead and their child will inherit her dynasty. She lets them believe it. For twenty years, Monica plays the trusting wife, indulges the false heir, and secretly prepares the son she saved. As the family gathers for the succession ceremony, the traitors are ready to claim everything. So is she.