As others mentioned see a doctor, have her stay off the bike until the sores completely heal and get a different saddle (like a Brooks). I'm going through some chaffing issues right now that were caused by shorts with seams in the wrong places, a saddle that's a bit too wide for me and a warm afternoon ride. This was over a month ago. I never took any extended time off the bike to let the chaffing heal and as a result I'm not riding at all this week and maybe next week depending on how things go. It's not too bad though as I am in the process of exchanging the Brooks B17 I had for the narrow version of the B17 and don't know when I'll be receiving the saddle as the place I ordered from doesn't have the saddle I want in stock right now.