CSA0763: Carroll: This sounds fishy. Clear it with mom first.
And then she explains and clarifies a bunch of stuff we already knew from earlier, and mentions that this will be useful if you ever decide to go resolve incidents with Sacchin. She stops your father from using the phrase "weird puzzle shit" even though everyone knows you already know the word.
She doesn't tell you that Sacchin will also be there, though. You remain entirely ignorant about the presence of the other player character.