The Wild Child

Description for THE WILD CHILD by Mary Jo Putney:

Bribed by Kyle, his twin brother, Dominic Renbourne agrees to take his twin's place for a few weeks at Warfield Park where he is to pay court to Lady Meriel Grahame, the orphaned heiress Kyle intends to marry. The last thing Dominic expects is to be entranced by a silent sprite whose ethereal beauty is as intoxicating as the flowers and trees that surround her.

For much of her life Meriel has lived outside normal society, finding joy and peace in her garden, safe from the nightmare that nearly destroyed her as a child. She is content with solitude--until the attractive and dangerously perceptive intruder begins to inspire dreams of life beyond her sanctuary. Despite his longing, Dominic's sense of duty keeps him away from his brother's future bride, but Meriel's untamed spirit proves more powerful than Dominic can resist....

This is #1 in Bride Trilogy.