Gotta say "THERE ISN'T A SINGLE ADULT IN OUR LIVES THAT WOULD EVEN MIND!" is one hell of a line. Hilarious and disturbing.
Tomo's probably right though. Even if, in the worst case drama scenario, she got pregnant and had to drop out, she'd still be able to succeed the dojo and style of karate and run that school, once she gave birth and recovered. And then there would be another generation already waiting in the wings.
I'm not sure her parents aren't just absolutely shooting for that, rather than considering it a bad ending.