Interesting post I must say. I supposed that once you have the Karma to be a Sangha no matter how you want to avoid you will still be a Sangha. It is good that she found her purpose by becoming a nun again and at the same time running an orphanage to benefit the orphans with the dharma, I rejoice!
Seems that is the case, once we have the karma (to be Sangha in this case), we cannot avoid it. It is indeed a "happy ending" for she had found her way back to lead the holy Sangha life and even do more for the orphans.
Having said that, we cannot be rigid in our understanding of how karma works. Though for heavy karma, most likely we will follow the path back, like in this case or the case of heavy negative karma like killing; however in most cases, the ripening of karma can be changed. By changing our current actions, we can change the 'effect'. How does it work?
Actually we can delay the effect by stopping negative actions and do the virtuous actions; and then we work on purifying whatever negative imprints we have by engaging the 4 opponent powers.. Our previous karma imprints or seeds need right conditions to grow and bear fruits. So actually we can still change the 'fruits' (good or bad fruits) by providing the right conditions.
The Four Opponent Powers are;
1. The Power of Regret;
2. The Power of Reliance;
3. The Power of Remedy (the antidote);
4. The Power of Resolve.
http://www.zhaxizhuoma.net/DHARMA/purification.html
