I have a committee in my head that sometimes makes me insane because it will not shut up about whether I should do something or not. It is so easy for them to run amok with all sorts of reasons for whatever is bothering me. I find that only closure on a situation (whether it is positive or negative) will finally quiet them down.
To find closure to your situation, just ask her. You can call her up and invite her over for tea/coffee and ask if she is through with auditioning the fabrics that she took for her quilt. If she says ‘yes’, ask if she can bring back the fabrics she is not using. If her life is hectic, she’ll be glad for a little break in her schedule.
If she is a user, it won't bother her that you asked. Users never hear what people are asking when it doesn't coincide with their plans. That is why they can blatantly use people and never have it bother them.
If it is an oversight on her part, because there is so much going on with the quilt and wedding plans, she'll be glad you called to remind her. It is so easy when you have a deadline to get blinders on and not remember the things you promised.
Communication is so important. Closure helps us to move on, learn from our mistakes (if any were made) and gives us our power back.