However as everyone is pointing out that Sid's mom didnt try to correct Sid - which is wrong. She told him clearly if you think you are right and dont feel guilt its okay. But at the same time Rage is not a done thing in any circumstance. I am not putting the exact words but this is basically what she said. So she did berate Sid too.
As for Sky, the guy was being so rude standing away - so what if you have a problem with the son, give respect to the elder person who is the mother. Sky's and Amar's hostility was apparent. So she just remarked on it - and it wasnt all that rude. She was trying to talk to everyone and Sky (becoz of his nervousness or whatever) kept trying to be away - and she was merely trying to include him. And how rude was Sky sitting with his legs up to an elder person he has just met. I would never do that.
Also at the end of the day Sky has used Sid really badly while he could and treated him like dirt when Sid refused to toe the line (Sky's line) any more. If I was Sid's family member maybe I would have been angry at Sky too...so some veiled hostility will obviously be there.
Im not saying Sky's sister was not sweet - she was... but again she comes from a more "sophisticated" background like PB and gang where even meaness is an art and is hidden very well inside sugar-sweet words and actions. I think it was rude of her to get gifts for only 2 people and then even if she did that - to give it in front of everyone - VERY rude and wasnt that also a way to make her displeasure towards the others known same like Sid's mother?