Time to put on your big girl panties my dear.
Simply say, "No, I am not going to share my pattern with you. Not only is it a copyright violation, but the designer is a good friend of mine, and I want her to get the revenue she deserves from her work. I will be happy to give you the ordering information so you can get the patterns yourself." And stick to it.
Why are people so afraid of being ethical now days? Most people seem to think "It's all about ME", not what is right. It is time for those of us who know better to grow some spine and stand up for what is right. And if other less ethical people "think less of us", so what?