But one thing the Chapel I watched for years never would have done was jump ship because things went south with her love life or plans. She confessed to Spock she loved him, even while engaged to Roger Korby. Spent the next 3 years clearly hung up on the Vulcan. So I find it hard to believe that she would have left, just like that.
She went to "the frontier" - perhaps because she heard that a Starfleet ship would be patrolling the area where Dr Corby went missing.