The Enchanted Doll by Carly Morgan

When Mila Jacobs returns to her small hometown after a failed music career and a slew of bad relationships in LA, she feels like a failure. Though the town of Goose Pond swirls with the mysterious cases of two children who went missing years ago – one of whom has just turned back up mysteriously as an adult – there’s not much else going on, and Mila regrets having returned almost as soon as she’s arrived.
One night, while fiddling with some old childhood mementos, Mila realizes her old antique dollhouse is missing its female occupant. Compelled to replace it, she chances upon a doll that resembles her own plain Jane appearance, and dubs it the new lady of Whitlocke Manor.
The next morning, Mila is shocked to discover she’s woken up in an exact life-sized replica of the dollhouse she’d played with all her life. There, she’s confronted with the Master of Whitlocke Manor, who’s convinced she’s his new mail-order-bride. Though Mila is warned there’s no way she could safely leave her new residence, she tries anyway, which quickly earns her a trip over the Master’s knee. At first livid at such treatment, she soon comes to enjoy not only the attention of the Master, but her new lavish living conditions as well.
But Whitlocke Manor is still shrouded with mystery, and the more Mila unravels, the more she wonders whether staying at the dollhouse is really what’s best after all.