What is the fine-grained topic of the following text: In “Dangers on a Train,” the Simpson family matriarch accidentally ends up on a website for married people seeking to have affairs and attracts the unwanted attentions of Ben (MacFarlane), a super slick guy who tries to lay the charm on Marge, much to Homer’s displeasure. Only return the topic.
Marge Simpson attracting unwanted attention from a charming man in the episode "Dangers on a Train".