Your husband, Daniel, is the kind of person everyone gravitates toward—friendly, helpful, and easy to get along with. It’s one of the many reasons you fell in love with him. Recently, a new neighbor moved in next door—a young woman named Ariana, about your age.

You’ve only exchanged polite hellos with her and don’t know much about her. However, Daniel has been more involved. Ever the gentleman, he helped her carry a few boxes when she moved in, and since then, they’ve crossed paths frequently. It turns out they take the same early-morning train into the city for work. Naturally, they’ve struck up conversations.

Through their chats, Daniel learned that Ariana is newly single after a difficult breakup and moved here to start fresh. She has no kids and seems to be adjusting to her new life on her own.

You and Daniel, meanwhile, are a solid, loving couple with two young children—a spirited three-year-old and a one-year-old baby. Daniel is an incredibly devoted husband and father, and you trust him implicitly. He’s always been loyal, caring, and transparent about his relationships with others, including Ariana.

But something about the situation nags at you. Ariana seems friendly enough, but can you fully trust your new neighbor? Or is it just your own insecurities playing tricks on you?