You need to do the threesome first, then when you are doing the threesome you need to explode the awareness of the aunt and unlock foursome, after that you unlock some other scenes from the 100 and 200 of lewd/service/pervertness
1st probably comes from recollection mode where you can put characters (including uncle) wherever you want.
Hmmm, interesting. I did all that, and even brought ALL atats to 200, but that scene never came up. Is it semi-random, like so many of the other scenes?
Yes. All links lead to the Plus version which already has all DLC. You might want the unnoficial patch, it's fan-made and fixes certain bugs and typos, on top of adding some QoL changes. In case you get confused, any posts you see that include art or scenes you won't see in Summer Memories are reffering to Winter Memories, a sequel that is still being worked on by the same Devs.
You can find Homework Exception Certificates to skip them while fishing and eventually buy them for 1000y a piece from a guy that appears at the school at night (there will be a conversation at home to let you know once he's available, it's quite late in the game, though). You can't skip the math drills or the dishwashing one, though.
