I used the Fast Travel option to go to the worldmap, walked through Tabsy's farm, and she had the ! above her head to show that you can talk with her to start the new quest. In the brothel, the manager also has the ! icon.
Did you perhaps used the update files but skipped a version or more? Then you'd be missing files in your game, and thus don't see that content. In that case, the safest way to ensure that you have all files is to download the full game again, and copy the entire save folder to the same location in the new game folder.