An infatuated 13 year old waits 15 years to confront an illegal 'lover?' Not within the realm of reality! It just doesn't ring true...
What did she do while waiting for the ultimate confrontation? Obtain an education, or get a decent job? We don't learn much about that long period of time.
In spite of the rather contrived plot, acting performances were generally pretty good, however. Stokes, as young Una, was definitely very alluring bait..