Are You Obliged to Save the Violinist?

"We don't actually have to stay in bed with the violinist for nine months. And I wouldn't do it." "I think if you willingly attached yourself to the violinist, then I think you do incur a kind of obligation," he says. But she will argue that you can't just say that the obligation to keep both fetus alive accrues to her because, well, she was engaged in sexual activity and even if she was using contraception or whatever, she knew what the risks were'