And just curious - but how did she "just" manage to get pregnant. Are you sure she isn't doing it as some bargaining tool and is she definately pregnant..... if so how far on ?
Woman can be very strange creatures and there are substantially more nutters than blokes care to realise.
I just find it strange that she has a child from a previous marriage, yet has to take a morning after pill - then just happens to get pregnant. Most women would understand the correct use of a contraceptive (at least the point of taking to not get pregnant) after their first child.
How can anyone have a mishap with contraception? It's pretty easy. You don't want babies, you use a condom. Simple.
My brother was in this exact situation before he had his first daughter. He and his partner ended up splitting and his life was hell for the first few years. Of course he loves his daughter completely and utterly, but if he could have changed the course of timings he would have. He was drunk, used no condom. His own fault. But he dealt with it.
They aren't 100% effective.
Regarding the MA pill, condom broke - pill was taken, period happened week or so later. Baby conceived 2 weeks after that.
No crazy nut job lady here.