Both Sokka and Asami joined the Avatar's side, despite not having any bending powers of their own.
Once they were alone and safe again, she happily shared her affections.
After the fall of the Capitol, the Progressive rebels fight back to overthrow the Traditionalist regime led by Korra and her fellow fighters.
When Asami's father turned out to be an Equalist, Bolin, Mako, and Asami went to live with Korra on Air Temple Island.
All of it might have seemed a little fast, but these women already knew and loved each other.
Korra wanted to carry on the family tradition, but didn't want to live in her father's shadow - so she went to Republic City to start a new life and forge her own reputation as a big-city firefighter and paramedic.