<human>: I just met with my father's family for the first time a couple of weeks ago. I recently found out that I have a half sister.

After contacting her, she said she was aware of me for a while but never knew how to contact me. We set up a time to meet but she never showed. 5 hours later she texted me saying she "forgot" and was unable to contact me because she was at her kid's sports event.

My family says she does this often and they think she was hungover. She told them she was nervous about meeting me. I personally think she was hungover and that I wasn't a priority to her. I'm really hurt and don't know how to respond to her, or if I should at all.

Can you provide a brief overview of the text?
<bot>: Was supposed to meet my half-sister for the first time and she stood me up. How do I respond to her lame excuse?