She is a breakfast TV producer and follows her life after Jack, the guy she likes (and her colleague) starts dating her best friend Simone.
And last night it all came crashing down for Lily, as her betrayal of Simone by sleeping with Jack and then trying to hide it caused both relationships to turn sour.
But while the narrative always has Lily at the centre, for me she's not the standout of the series.
It's all about Simone.
In many ways she's actually "the wrong girl" the series is named after, but I'd argue that she's actually very, very right - precisely because she doesn't always get it right.
Sometimes, Lily feels a bit like forced caricature, while Simone appears far more human and relatable.
Here are seven reasons why she's the real hero.
It's no secret that fans are more than a little obsessed with the clothing and interiors in the series, but Simone's eclectic layering and colourful wardrobe are scene stealing.