My mom turns out to be a Mafia godmother

Mafia godmother Catherine finds her twin dying of cancer. On her deathbed, the sister begs Catherine to raise her three children. Catherine poses as her sister, discovering the husband never loved her—he cheated for years and moved his mistress in. Raising the children, Catherine uncovers the truth—her sister was deliberately poisoned by the couple. The formidable godmother will make them pay.