<human>: My mom was called by the police department 3am two nights ago to report my sister, who was charged with underage drinking, and a 29 year old male drunk driver.  As it turns out, she's been dating the driver for 2 years, has slept with him multiple times, and has been lying about her whereabouts and who she's been hanging out with....for 2 years. We were really really close. My sister is one of my best friends, and I feel so disappointed and betrayed I might throw up. I no longer live in the same state, and neither does our dad.  I have no idea what to do or how to process this.  Any good, kind advice would be. sincerely appreciated.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: 17 yr old sister got caught drunk with a 29 yr old drunk driver who she has been secretly dating for two years, and I don't know what to do.