What is the significance of Frank watching Lucas kiss Zoe?

What is the significance of Frank watching Lucas kiss Zoe? - Man and Woman on Bed Using Laptop Computer

During season 01 episode 07 of House of Cards, at about 41 minutes into the episode, Lucas drunkenly stumbles into Zoe and in a half-coordinated romantic advance, kisses her.

Frank, watching in his car, makes this face: enter image description here

The background music then changes to a serious tone, so this must have somehow been a significant moment—but my question is, how was it significant? What did it mean?






Pictures about "What is the significance of Frank watching Lucas kiss Zoe?"

What is the significance of Frank watching Lucas kiss Zoe? - Positive woman kissing cheek of ethnic husband browsing tablet
What is the significance of Frank watching Lucas kiss Zoe? - Enamored woman with short blond hair in warm sweater kissing cheek of happy ethnic husband using tablet during breakfast at home
What is the significance of Frank watching Lucas kiss Zoe? - 

A Woman Kissing Her Husband while Her Child is Watching on a Laptop





British Gays Reaction to Lake and Lucy KISS | Love Victor Season 3 Ep 1




Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Gustavo Fring, Gary Barnes, Gary Barnes, Pavel Danilyuk