I wanted to follow up. I appreciate your taking the time to answer me; unfortunately, I have been unable to replicate this trick in the current version of the game.Yup. The advance time button updates everything that needs to be updated, like NPC positions. So, you would go back an hour early to the event you want, and use the advance time button to update everything properly. If the event is at 10:00, you'd go back to 9:00 and use the advance time button.
I've tried about 20 times to get Lil to happen by while MC is fucking Jill (I quicksaved on Saturday morning 8:00, advanced to 9, then tried to trigger the event. Nothing. Only did this on Saturday because Lil is at school at 9 on weekdays.)
Similar non-results with trying to get Lisa to walk in on MC in the bathroom at 1 am (quicksaving at midnight, advancing time, etc.) Again, no luck triggering Lisa's boob event at 1800 by quick saving at 1700, etc.
Perhaps this trick used a feature from a mod, or worked in a previous version of the base game but no longer does. Or maybe it's just me. Whatever the reason, this feature refuses to exist for me.