Yeah, I'm pretty sure it's bugged out for some people because I had the exact same issue on the previous and current version, with nothing appearing after the second visit (100+ days, using original saves as well as resetting using the older 100% saves posted in this thread).
"Fixed" it by going into the registry under HKEY_CURRENT_USER\Software\Someguy\Something Unlimited, there should be an entry starting with suSlot01_taliaEvent with a value of... 3, I think (or Slot02/Slot03 depending on where your save is). Increment that value to 4, and Talia should immediately appear when you check back to the office. Couldn't see any progress in the following 50 or so days after that, so I had to increment it again for the slave orgy (5->6)