I remember reading this book as a kid. Just can't remember the name of the book.
The story goes something like this:
The heroine is this school teacher. And the hero is a rancher who has to adopt his sister's kid, as his sister died in a car crash. To adopt the kid, he must find a wife. Later on it turns out, the heroine is adopted too and has a twin sister who goes around writing bad cheques.

It would be awesome if anyone could help me out with the name of the book!!!

I didn't read this book, so I'm not really sure if this is the one, but I wanted to read this, and description kind of matched, so maybe It's this book?

"A Theory of Relativity" by Jacquelyn Mitchard

P.S. Sorry about my grammar

Thanks but that's not the book I am looking for.