An acceptable enactment of a "Twist Villain" reveal

Y'all watched the movie "Swapped"? If no, then spoiler alert(not really)... if you did, then you know what issue I'm talking about concerning "Twist Villains". Isn't this another case of "Rules of Literature vs Natural Story Progression based on realism"??? I thought fiction... is fictional??? Then people ask for a little bit of realism, but when an author DOES integrate realism, readers still complain and try to disassemble the logic. There's this rule where the author MUST provide clues to make it fair. But realistically speaking, IS the reader capable of even putting two-on-two together? Yes, I know... I shouldn't underestimate the readers, Buuut~ I wouldn't wanna overestimate them either. 😐 100% trust isn't always good. ESPECIALLY when they're the "Quantity" half of the decision-makers on what happens to your work. I mean... sure, with two-faced characters they're bound to leave clues that was either intentional but mostly unintentional. But we're not monitoring them 24/7, all months of the year now are we? Picture this, Paula is laying on the couch and glued to his phone, and this was the image Paula's mom last saw before she went out for grocery shopping. A short while later, Paula leaves the couch and phone to do chores. These include washing the laundry then hanging them, sweeping the floor clean, emptying out the trash and washing the dishes. Afterwards he goes back to lying on the couch and playing on his phone. The mom comes back to see Paula on the same exact position from before and after. Then a lecturing ensues... Now time to reveal the analogies • The mom assuming Paula was on their phone the entire time based on face-value observation = is the reader seeing what the secret villain does in their past time, at least whenever they show up in the story. • Paula doing chores without the supervision of the mom = is the secret villain doing ACTUAL villain stuff. • The chores done = Clues Ok, one could argue that I said it myself, the chores are the clues. REMEMBER the viewers are the MOM'S POV. Also it requires them to be investigative, and we all know that 60+% of them aren't capable of that. I thought Literary Rules stated that I AM NOT supposed to serve it on the silver platter? So, what is the BEST solution for this issue?