I Can't Divorce Because I Love My Family

I woke up inside my favorite novel, but with a huge twist, I’m not the heroine. I’m just a nobody side character with plain brown hair and brown eyes. My plan was simple, live quietly, mind my own business, and enjoy a peaceful life. It was perfect… until I somehow ended up married to the story’s male lead, the heroine’s father! My new goal? Be a kind temporary stepmom, make the little girl happy, and then get a clean divorce. There’s just one problem. My “husband” is incredibly kind and way too handsome, and our “daughter” is absolutely precious. My heart wasn’t supposed to get involved. What is a side character supposed to do when her exit plan starts falling apart because she doesn’t want to leave?