User blog comment:X-Machinist-X/Dishonored random stuff/@comment-26947588-20151017034304/@comment-16533050-20151019003234

@ Torchwood

Wherein does it say Billie Lurk became an invalid? Where does it say she quit training?

Billie is spared by Daud and slips away to a quieter life

Quieter could simply mean more careful, or not as bold... not in the limelight.

She could still be a criminal, or a captain of a ship. She could still be training and enhancing her skill with swordsmanship and the wristbow.

I'm pretty sure Corvo had a somewhat more quiet life after saving Emily and ending the short reign of Burrows and then Havelock. Yet he still trained and kept himself in shape.