Pretty sure Ivy needs to be unassigned or even not hired for this to have a chance to trigger
Batgirl also needs to be in a bordello slot
I believe the correct procedure is as follows:Why does it say in the walkthrough that she needs to be assigned to MB then?
- Put Batgirl in a regular bordello slot and watch her from the monitors. You will get her regular MB scene.
- Next night hire Ivy and assign her to MB while Batgirl is still there and watch the monitors. You will still get her regular MB scene.
- Next night remove Ivy from her post in the MB while Batgirl is still there and watch the monitors. You should get her scene with Ivy.
- If the new scene did not trigger, keep watching the monitors every night.
This scene is notoriously convoluted (read: probably bugged).