Seduction of a Highland Lass question

I need help. I read a highland romance book a few years ago and cannot remember the title and really want to read it again. It was about a highlander that I think was handfasted to a girl who was very good with either a knife or a bow and arrow and also good with the lairds dog. He had planned to humiliate her and return her to her family but they fall in love and she becomes pregnant (he didn’t know). Seemed like he had changed his mind until his true betrothed who was crazy shows up and he follows through with returning his true love. I seem to remember that before sending her away she throws a knife at the laird that lands between his feet before leaving. Of course it’s a romance so he goes after her. Any ideas from my very vague bits and pieces recollection of this book?