It doesn’t seem like Estelle has told many (or any) people about her affair. But like Julia, she’s feeling less inhibited in strangers’ company, and the story of her affair allows her to offer another perspective on marriage. Knut wasn’t able to fulfill her need for a reading buddy, so she ended up turning to her lover to fill that need. However, in other ways, she remained faithful to Knut and never intended to leave or hurt him. In fact, this is likely why she never told him about her affair: she figured it would be intentionally hurtful to share, and so she kept up their agreement to not purposefully hurt each other.