Things Theresa and Aidan should never do at Hogwarts.
Aidan should never refer to Hagrid as a "Great big ugly giant." No matter how hard it is to resist.
Theresa and Aidan should never sneak out of their common rooms after hours just to joke about what they did that day.
Aidan should never pull a prank on George Weasley when at his house cause he should know that George will just pull a prank on him that is worse.
Theresa knows that she will have to get Aidan out of whatever prank George pulls on him, in case Aidan is stupid enough to do the above.
Theresa should not annoy the Hufflepuffs merely because she was nearly put in that house.
Theresa should never use Umbridge's quill to write "Told you I was one of the bad guys."
Theresa will never become a death eater even if she has to run away from getting killed for the rest of her life.
Aidan should never practice new tricks on other first years, especially his twin.
Theresa should never mock Aidan when she gets higher marks than him in exams.
Trying to come up with a plan to get rid of the new Defence against the Dark Art's teacher is only going to get you expelled, Theresa.
Aidan should never make fun of the fact that all of the past Potter's have ended up with a redhead.
Aidan should never pull someone's earmuffs off when they are pulling out the mandrakes.
Making fun of Scorpius's dad is not a good idea.
Theresa should not draw a fake dark mark on her arm and claim she is the youngest and only one left, death eater in existence.
Simply because that wouldn't make sense since Voldemort is dead now.
Aidan should never mockingly howl in front of Teddy just to see him get all sad.
Theresa should not try and act like Scorpius, because she knows that would just freak him AND his dad out.
Theresa should never ask Professor Longbottom to tell stories about his time at Hogwarts when he was younger, and then ask if he's going insane. But she is allowed to ask him to tell stories, but is not allowed to question his sanity.
Theresa should never hand in muggle fairytales as her History of Magic homework.
Aidan should never follow the potions instructions backwards just to see if it blows up.