I would NOT wash the quilt before binding. Can you lay it over some chairs outside for a short while. I'm thinking the outdoor fresh air will help it to air out quicker than sitting in your sunroom.
The only way if absolutely necessary (but I wouldn't) is to just soak in the washer and then spin. I would FIRST, sew all along the outside edge of the quilt the entire way around the quilt to make sure that you're binding the top, the batting and the back all sewn together at the edge. Hopefully you have not squared up your quilt, sew the edge, soak, spin, dry, then square up and sew on binding.
Is there a liquid Fabreeze that is unscented? If so, that may work. Fresh air would probably be the best solution. This may take several days of letting it sit out in the fresh air. (IMHO, this is the best course of action.)
I would be sure to ask the quilter what she used and why before giving her any other business. You may want to mention to her that she should ALWAYS ask each customer before she continues this practice with her customers. She may be trying to give you back a nice smelling quilt, or she may be trying to overcome smoking or cooking smells. She does not know this could be a problem for you, her business and customers unless you discuss the situation with her.
Good luck, please keep us updated on the progress of your quilt project, and please share photos if you're able.
Pam M