Could you select her and continue with your testing, too? I'm at SG, too, and seem to remember that you can pull out of a cycle without penalty up until the point when the donor starts her meds. Maybe by the time the cycle starts you'll have an answer one way or another. And if you find something amiss that takes time to address then you can make the call to drop out of the cycle.
You'll want to check the fine print first, but I seem to remember that's how it works.