Yes, it drives me up the wall that so many people get round difficult issues by pretending they're not difficult. "Animal testing doesn't work anyway!" "Carrying a pregnancy to term never threatens anyone's life!"

Pro-choice people do it as well: I see "it's better not to be born than be disabled/poor/bullied, so abortion is good for the foetus too" distressingly often.

My understanding of Catholic doctrine was that killing is acceptable in self defence, and that can sometimes include abortion, but I'm not an expert. I may well have been looking at unusually liberal sources when I gathered that.

As for contraception - the answer would presumably be that your cousin should use natural family planning (and/or that it's wrong that pregnancy would literally kill her).