"I mean," Inej says, and rolls her eyes a little bit, "I'm on a synthetic hormone to prevent an accident happening, at the moment, and it could still happen. You're with someone who, normally, is sterile. You weren't stupid. You were going about things the way you had been since you'd been with him. Why would you think it would be different than normal?"

She lets herself be mad at Zoya, wherever she is, for putting the idea of Nina's silliness into her head too hard. But then, Inej thinks her mother would also have called her silly if she'd managed to get in the family way without getting married first. But things happened sometimes.

She wouldn't dream of asking if Nina plans on getting married. That's hardly the point here.