Intriguing ending to Yiyun Li story in current New Yorker

Yiyun Li story in the current New Yorker, A Flawless Silence, is topical, in a way (it's a metoo maybe story) and part of a growing trend in American fiction of stories about first-gen successful, well-educated immigrants and their assimilation and contribution to American society and culture. That's all to the good, a necessary corrective to angry, racist, paranoid, and demagogic rhetoric that has been poisoning our lives for 2+ years now. In discussing her story, I will give away the last line, so spoiler alert here. The central chracter in the story is a Chinese-born woman who has emigrated to the US and seems to fit in very well with the culture of her new land, and in fact has become a voting citizen. A minor school-yard crisis begins via a third-grad class assignment that involved writing to one of the '16 candidates, and one boy is ostracized (and his family shamed to a degree) because he chose Trump. The protagonist's husband, as it happens (also a Chinese immigrant) is also a Trump supporter, and he tries to drill Trump propaganda into the minds of his children. That's all foreground, establishing the wife's contemporary character and good relations w/ other moms in the school community. The heart of the story, however, concerns an elderly man whom she met when she was a teen in China who was interviewing women to find a match for his son; he passed on the protagonist, but then continued to pester her, suggesting he could give her English lessons. If that wasn't creepy enough, it turns out that he, too, has moved to the States, and continues to stalk her by email (they have met face to face only twice; apparently the email messages have been coming for years). So we see the woman as a victim, as vulnerable, and as passive (not only in re the creep but in re her domineering husband also). At the end of the story she decides finally to take up arms, and for the first time responds to the email, at first writing "Please do not email me again" and then changing it to: Go to hell. Good for her, finally showing a little gumption - that is, becoming more American, more outspoken, more "woke" in the current phrase - but is it enough? Aside from wondering what took her so long - a polite no-contact request at the outset might have ended everything right there - perhaps a real threat - of police or legal action - might have been even more profound. Telling this elderly creep off, in the end, is kind of easy; what's she going to do about the creep w/ whom she shares a life?