She has been a member of the Liberal Party and has served in the Australian Capital Territory Legislative Assembly since 2016, representing the electorate of Kurrajong.

[5] In February 2018 following the death of Steve Doszpot, the Education portfolio was added to Lee's responsibilities.

[8] In 2021, Lee introduced Australian-first stealthing laws, which criminalised the non-consensual removal of a condom during sex.

She also released an exposure draft for legislation that would mean harsher penalties for perpetrators of domestic violence.

Castley announced that she had run against Lee due to concerns about trying to form government with the Greens in the aftermath of the election.

[4] Lee voted Yes on the 2023 Voice to Parliament referendum, supporting the "Libs for Yes" campaign organised by former Liberal Chief Minister Kate Carnell.