1 Book Found

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"So, I'm looking for an old historical romance book. Can't remember when it was produced but I read it a long time ago. It's one of those big romance books. I remember the name being Boundless. Or something like that. I can't remember the author's name. I know the story was about a woman who came to the city dressed as a boy. Gets caught by her boss. Eventually marries him. He dies. And then his friend? I can't really remember. But I think his friend has always liked her. The moment he goes home and comes back with a new bride, that's when the woman he loves becomes a widow. His new wife falls in love with an injured man whose horse fell on his leg and seeked refuge in their house. She owned a pub. He had a large estate. She gave birth to a stillborn child."