

Jo and Laurie were the same age and already in their mid-teens when they met, so they were always more like buddies rather than brother and sister, and most of their interactions contained some playful flirtation (usually initiated by Laurie and received somewhat ambiguously by Jo). They were very different from the beginning. I understand why grown up Amy's personality would be attractive to Laurie, if they hadn't been as close as they were when she was a child, but I don't agree that Laurie's relationships to Jo and Amy were in any way similar. Laurie fell in love with Amy for her personality. She's more level-headed than Jo and that invites Laurie to be reflective and listen to her, not just keep arguing and make up later once they've both cooled off. Amy doesn't clash with Laurie she stands up to him, but she does it in such a way that doesn't always put him on the defensive. Both Laurie and Jo are all sharp tongues and sharp edges, and they would clash a lot if they were married and living together- and this is a time period where divorce was not unheard of, but still carried a heavy negative social stigma. Amy is strong-willed, stubborn, and unafraid of telling Laurie if she thinks he's out of line, but she's also more refined and polished than Jo. They're both too snarky, tempestuous, and argumentative, and while that's okay for people who are just really close friends, it wouldn't make for a harmonious marriage. And that the given reason for Jo not falling in love with Laurie is that they're too similar in personality, not that they she sees him as a brother.

She'd changed a lot and this drew a starker contrast.

In and of itself, I don't see any obstacle to the love between 2 people growing up Like Brother and Sister but who aren't actually related by blood turning into romantic love later.I know the age difference between Amy and Laurie is only three or four years, but their love and marriage would seem more normal to me if Laurie was ten years older yet they simply hadn't had much interaction when Amy was a kid. I have some childhood-friends-going-adopted-brothers who are near my age, but I could never think of them as anything but brothers. It's strange to me that one can fall in love with somebody that they saw as a little sister up to that point. But when you look at Laurie's interactions with Amy during the first book, you see that he acts like a saucy older brother and Amy like his spoiled little sister. So it's not the "marrying your unrequited love's sister" part that I have a problem with. I know that out-of-universe, it's just a way of making Laurie a part of the March family without having him marry Jo, but in-universe Laurie and Amy were like brother and sister. I don't understand how Laurie can fall in love with Amy. Laurie and Amy falling in loveOk, this is not exactly a question but it's still something that makes me scratch my head.
