Reincarnated

Lady gets isekai into being a stepmother for a family known for being horrible. But they’re not what the rumors appear to be.

Lady gets transported to be main character’s evil aunt. But turns out she doesn’t want to meet the same fate so decides to raise the kid preciously until his uncle picks him up. However when the time comes the kid refuses to leave his aunt behind leading to our main character getting dragged into some royal business.

Lady gets reincarnated into being the tyrant’s stepmom and decided to treat him kindly. In the meantime she gets into a contract marriage with the man who is supposed to adopt her son but he appears to be already invested in this fake relationship.

Main character is a Stan for the son of a Duke and stalks him for a bit. That is until she is caught, what she expected is to be punished, not to be proposed to and become her Stan’s future stepmother.