She already suspects them of hiding something from her, and she doesn't see the immediate danger she's in. This guy was introduced as a client of her father's company- someone close enough for him to bring into their home and ask for advice from, allegedly. How dangerous can he be? Reika also does think she is the smartest person in the room- that's early college life for ya.

Her involvement and being a weak link is a really fun conflict to navigate right now as an ally who needs to be kept in the dark, so I react to the same frustration as you two but with abject entertainment. This is a great weekly watch right now.

My burning question is how dad's gonna proctor a search of Majima's home without arousing suspicion since he's his only point of Yakuza contact as far as I can tell, unless he plans on another naked field trip into the cabaret dumpster?