This is not an "official" answer from Zorlun, but... If you look at the post where he indicates what is in the next update, it is not there.
The reference to a lawyer, make me feel that maybe Zorlun has decided to pick on some of the suggestions that were made about legal ways for payback to Anthony and/or to keep Marc in the game (if the likes are an indication, the incest patch seems to start to have a decent quantity of people liking it, and that means, liking the idea of Marc still in).
Or he has another idea in mind, I have something in mind, but I hope is not that (unless he applies it to two characters).
The pool party is not in the next update, and I would expect also not in the one after, where there will be the dinner with the school principal, if so chosen, which is in the week, while the pool event is at the week-end.
In general, I would say one-two updates (I would say more often two, and could go up to three) are needed to cover a day, so I would not be surprised if for the pool event (that is supposed to happen in the week-end) you have to wait between four to five updates, also because probably will not be a small event with just one phrase and one screen (otherwise, people will have a big delusion).
Also, I guess Zorlun may want to start pushing forward also some other lines and characters, like the "charitable actions" (which could easily end up including also Aiden).
Yep, I know, that means actually four to five months for the pool event, a long time. But anyway, is my estimate, not Zorlun's official answer.