People ask me all the time for a copy of a pattern I've used that they like. I have to be honest, if it's really really old, and not being published any longer, I'll make a copy, otherwise I'll tell them who the pattern maker is and let them know where they can buy it themselves. The last pattern I copied was nearly 25 years old.
A few years ago a coworker that was retiring was asking me to make copies of all sorts of patterns she wanted from me based on projects I had made. I couldn't believe how brazen she was. I gave her all the info she needed to find and purchase the patterns for herself. All were patterns individuals had created and copyrighted. She never spoke to me again! She knew exactly what she was doing, she wanted something for nothing, and I was not about to oblige her!
I have the same issue with my SIL but I just never provide her with what she asks for and eventually she forgets about it!