Not your problem if she's travelling, she should have thought of that before buying, send it. Otherwise it's you that gets the postage defect when not posted within your handling time.

I had a serial neg leaver a few years ago buy from me on 2 accounts (both as bad as each other in the neg department). She'd bid in the last few seconds so I was powerless to stop her. I worried myself sick for weeks, thinking I'd be her next victim. At that stage I think she'd left 45 feedback on one account, 43 were negs. The other was around 20, all negs. I got green lights on both! I must have got her on an off day.