There are only a handful of people I feel comfortable loaning my patterns/books to. Free patterns from blogs and fabric manufacturers are wonderful you can just guide them to the website.
If she needs to "borrow" quilt books I would guide her toward the local public library. Ours has a couple of shelves of quilting books you can check out for 2 weeks at a time, we can also get up to 13 renewals on an item. The selection might be limited but the price is right.