<human>: I just met with my father's family for the first time a couple of weeks ago. I never had a relationship with him growing up because of his drug addiction. I recently found out that I have an older 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. She offered to meet another day when she is off work and noted the 2 days per week that she has off.

My family says she stands them up 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.

Could you distill the essence of the text into 1-3 sentences?
<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?