i have been doing that for a while now... I dontsee how I can unlock the new scene.. sex with the y sister
If you have already the boyfriend training going on with one of the sisters, try different methods to advance futher.
If not then sometimes do not join the dinner and the tv. Just wait upstairs after the tv time is over. If the argument has triggered then you can confront both the sisters about it. It may take a few times. Also if you want then one person said this: ``Just save before the they are watching tv, and advance the time by one time, if the scene does not trigger, try it few more times.´´
Or just simply i can drop my all game savefiles to you and you can have a crack at them. I have saved before any scene, i used the rollback time, so i have the sisters gallery already.