Dearest Parents

Who knows
I have a question for all you parents. 
Let me give you a senorio: 
You daughter is 17, 18 in 6 months, she has graduated high school. 
You depend on her 70% of the time to look after your other two children, but she doesn't mind it. 
She has a boyfriend who is 20 (3 years difference calm down 😉) when she comes home from going out to dinner with her boyfriend and his family you ignore her when she talks and asks you questions...
WHY IS THAT???