premise: I wonder , did the decision come too late ? " Ryo snorts and ca n't quite decide where to look ; at Erika 's pretty eyes narrowing in irritation or the smirk of triumph blooming on Nino 's face . " Did you know , " Erika says softly , fighting a grin , " that nicotine will make you impotent ? " Nino shrugs and takes a long , long drag on his cigarette before replying , " Lucky Oh - chan does n't want brats , then . Why does Erika remark that Nino may become impotent from the nicotine in his cigarettes ?
hypothesis: She wants Nino to feel bad about smoking cigarettes