When a person was faced with one of two options to choose from, that person would most naturally gravitate in the direction in which they found himself or herself most at ease.
Think of it this way: An individual finds himself or herself at a crossroads. Two possible paths are open before him or her. Which way would he or she choose to go? Naturally, he or she would most likely go with the decision to proceed in the way that seemed the most familiar to him or her, that that particular individual knew was going to ultimately bring him or her home, or rather, in Yu Xi's case, an additional chance at life.
And on her way 'home,' it just so happened to contain a handful of foreign elements—these foreign elements were somewhat alarming but were not too concerning at the given moment, as long as she was still alive and kicking and was left with sufficient time remaining to continue to live, that is.