After the towing off the tracks missions, wait for a little bit. Tonya will text you. Call her, and you get another missions from her. Then after that there will be ANOTHER mission for her, but this one will be marked. Then her stuff is finally done.
If HK-47 and GLaDOS had a child, the awesome character they create would cause the video game world to explode. Join the Revengers! (board#: 587986)