Sounds like you just finished the third movie... still one more movie to go.
On Ann's Cheat log what step are you on? I'll need that to answer properly. (Your Room>Turn on Laptop>Cheat Menu>Cheat Mom>Check Flags
Should look something like this:
View attachment 433935
This will tell you where you are with her progress. Then you can peek at the 'Lines.txt' and see what the next step is for progress.
In this Example poss.car 76/92 to get to step 77/92 I have to keep a look out for 'I didn’t like the reaction of my mother while talking about her shooting outdoors. All this is strange.' poss.guest is 34/43 which means, to advance in the side quest, of Lisa Training 'I love our lessons! And the best part, I'm not even sure I'm the one who loves the the most! Let's see where else it can lead us...' And that is dependent on raising momlust, (Had to look at the Mod.txt to find the next level raise )which happens if you continue trying for more lessons with Lisa 'And new lesson - nude blowjob' will pop up raising momlust = 83, which then makes the other two options fire. (leave!set_poss.guest_35!set_momlust_83!add_mom.mood_75!max_cam.2.grow_3000!time^). It might be confusing but that is how the triggers are set. The only way to move forward, is to know where you are in the game. Cheers and Best of luck to you.