I played with this a bunch and couldn't get it to fire. Eventually I jumped into the coding logic, I couldn't find what condition was preventing the event from firing for me, but figured out how to force it. In the step house at 22:00 I entered in the console `GData.EventsQueue.append("SHouseHallSSistersConflictAboutDickLabel")` then went to the stairs and the event in question that I needed occured. From there I was able to continue on her path and finish everything.You need to see fight between Mary and Alexa when you travel between down stairs and upstairs. Traveling upstairs/downstairs after watching TV or meal at step-family's house.