It happens every year, and the sororities get used to losing girls to another sorority, and take it less personally than you might think. She now has two groups that like her, and that's nice for her. I'm only speaking for me and for my sorority, but we always looked fondly rather than bitterly on the "ones that got away" --- "hey, did you see Penny went ChiO? They're lucky, she was so funny."