I'm going to question my step-mother on how she makes her daughter fall asleep
Why would you question her about how she makes her daughter sleep?
It's so childish and stupid. I can't stand it.
That is her child she has the right to make them sleep how she wants. You should not butt in on matters that do not concern you unless she is in danger.
Nah, I'm going to give her daughter a flashlight to take to bed so she can be more comfortable.
Unless she is in some kind of danger you really shouldn't do that. You're going to get her in trouble and inconvenience your stepmother in the process. As long as no one is being harmed you should respect your families' parenting methods.