My Husband Wants Me To Take Care Of His Illegitimate Son

On the day Steven, my husband, died in battle, Luke, my only son, was kidnapped by human traffickers. Wendy, my mother-in-law, cursed at me. My parents blamed me for it. Even the villagers said I deserved it. While I was consumed by grief, Wendy suggested I take in an abandoned baby to continue the family line. Just as I was about to agree to it, words suddenly appeared in front of me. [The villainess wouldn’t ever expect the male protagonist to actually be alive, right? Does she know that he’s with the female protagonist?] [That’s right. Even the news about her son being kidnapped was fake!] I was confused. Before I could make sense of it, I saw more words. [Honestly, the villainess is pretty pitiful. Her husband faked his death because he likes her sister! Even her son isn’t her own flesh and blood.] [That’s not all. The abandoned baby is actually the protagonists’ son! When she brings up the boy and sends him to university, the protagonists will reunite with their son and be a happy family.] [It can’t be helped. It’s her fault for being the villainess. She can only be a stepping stone for the protagonists.] I was stunned. I was only to be a tool for the happiness of Steven and Margaret, my sister? As I carried the abandoned baby I had picked off the road, I sneered. If they wanted me to be their stepping stone, then they could not blame me for playing a little substitution trick.