Is the mom or the daughter wrong?

I have a coworker that I'm friends with who is an older woman. She has a teenage daughter and a toddler. She was venting to me about an argument she had with her teenage daughter. Basically the teen had made herself food but didn't feed the toddler while the mom was asleep. When she woke up she was upset because she said she felt like her teen was selfish and her teenager argued that it's not her responsibility to take care of the toddler. So my coworker said that she decided to stop spoiling her teen. She used to give her an allowance of $150 a week and take her on frequent "mother daughter" dates where they would get their nails done or go to a fancy resturaunt or something. She also said that she would take her daughter shopping a few times a month for expensive clothes and shoes and that had saved money to get her daughter a car for her 17th birthday which is coming up in a few months. She said that since that situation she felt like her daughter was selfish and didn't deserve to be spoiled and she has just been taking care of her basic responsibilities as a parent hoping her daughter would see things her way, giving her food and shelter paying her phone bill but no more luxeries. But her daughter has been acting distant and staying in her room or having random attitudes, rolling her eyes or just being snarky. So she said she will talk to her to tell her teen why certain privileges were revoked but she is hurt because she felt like her daughters response and anger at having her luxuries taken away showed her that her daughter only wants things to go her way and she feels like she is selfish. So who is wrong in this situation?

Is the mom or the daughter wrong?
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