Sarah's Christmas Blessing (Amish Love for Christmas #3)
Rebekah Fisher

This third and final book features Sarah, the youngest daughter of the Yoder family. Now eighteen, she’s been saving up every penny of her money all year long for a horse and buggy of her own so that she can visit her best friend who moved to the next town any time she likes. In fact, she expects her parents might give her some money for Christmas so that along with her savings, she can buy her horse and buggy.
She is also falling more and more in love with the kind and selfless Aaron Miller, who works at the buggy shop with his father and also volunteers at an English orphanage nearby. To her extreme delight, Aaron has agreed to sell her the buggy he had previously been working on once she's able to pay for it.
However, as it gets closer to Christmas, she overhears her parents discussing a matter that leaves her utterly distraught. She feels the situation is extremely unfair to her, and even brings it up to Aaron, who sides with her parents.
She must learn a valuable lesson, and her relationship with Aaron may very well be jeopardized...