Is it okay that I’m hurt and angry that my sister won’t make it to my graduation even though she has a reason?

Her reason is that she got a job offer where she could potentially make a lot of money over the summer and took it plus her friends are getting married the day before my graduation. I just feel like I’m getting the short end of the stick yet again even though I semi-understand her not being able to be there.

Is it okay that I’m hurt and angry that my sister won’t make it to my graduation even though she has a reason?
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