Sister has son similar age to mine who we visit twice a year or so. Everyone gets on well. When her son does something "wrong" whether major or minor and on every instance he will get a long talk about why he had to say please/not run/how he was careless for dropping his good...Her voice is not raised,generally fair though the talks get repetitive. She does the same to my son and generally I let it pass whether I think fair or not however yesterday it just got to a point where I thought it's just sucking the fun out of the day/visit and the talks should be reserved for unsafe/important issues.
I see her son unhappy with these talks but not my place to comment on style of parenting.
I guess my tolerance for letting certain things go are higher than hers.
Example: My son was getting the last pizza slice from a box and asked if he could have it. He did lift it out of the box and Sister from halfway across the room said "No, that is John's" and walked towards him so being startled he tries to pass the slice to her and dropped it. Instantly she said "you dropped it because you were rushing. Stop rushing so much!".
I knew John already had a slice and my son also only had once slice. So I asked why was it John's as they both had a slice so maybe they could have shared it? She said I don't who had what and that is irrelevant here. He was rushing so dropped it which is strictly true.
AIBU - Sister is doing me a favour so that my son learns?
AIBNU - Sister has over reached her boundaries?