I tend to agree with the likes of ummmm, knowing that the boyfriend does not want children and additionally having had an abortion - why not ensure pregnancy does not occur ? But then that goes for him too - vasectomy is simple and, unlike "the pill" ("I have always taken it, honest, must have been a bad batch") utterly reliable. There is currently no equivalent male contraceptive to the (female) pill and both sexes find the condom "procedurally" annoying if not unacceptable and it is not entirely reliable. Unfortunately, the onus therefore usually falls (unfairly) on the female - it would be very interesting to observe the statistics on unwanted pregnancy if/once a male pill equivalent was easily available, i.e. how carefully would males ensure they were unfertile. Moreover, it is usually not until the female herself is decided on not falling pregnant that "accidents" cease to happen.
Is it possible that the answer for Nay's part is to be found in the words "...this could be my last chance to have another child" ?