The Vigilante's Lover by Tony West, Annie Winters

Mia trembles as she reads the letter that arrives from Ridley Prison.
Seduction. Rope ties. Descriptions of things Mia has never experienced or known.
The man's words are desperately passionate. He longs for a woman who must have given him a fake address. Mia's address.
She plans to send the letter back. He's a convicted felon.
But his words gnaw at her. She's never done anything dangerous. And no man has ever talked to her like this.
So Mia writes him, pretending to be the woman he desires. It's her one dark thrill in her dull, solitary small-town life.
The man is in prison for another fifteen years. It's harmless. She is safe enough.
Until he escapes.
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This suspense series is COMPLETE with four volumes.