Big Sis, You Don't Matter Anymore

"On the tenth year of my marriage with Adrian Sutton as a replacement, my older sister, Vivian Cavendish, suddenly returns to our lives.The entire family just stares at her silently. Vivian yawns lazily before saying casually, "It's so exhausting, having visited 13 countries in a row. Where's Rowan? He should be studying in grade school by now, right? Why isn't he here to see me, his real mother?"Rowan Sutton is Vivian's actual son.In the past, after Vivian gave birth to Rowan, she faked her death on her wedding day, leaving her newborn and her fiance behind.The Sutton family comes from old money in the elite society. My parents dared not offend them at all, so they decided to force me, a college fresh graduate, to marry Adrian in Vivian's stead.Over the past decade, I've turned into a proper wife and a responsible mother.Upon seeing how righteous Vivian is acting, Mom and Dad turn to look at me. I just smile faintly at them instead."Rowan and his father are on a vacation in another city right now.""