Hey there, My GF posted a general invitation to join her at an event on Facebook. Some bro who to my knowledge is a former school colleague of hers responded, to which she jokingly replied "sure, should I buy you a ticket?" His response "yeah, how about for the night before ;)?"

So I know these two have travelled abroad before for grad school and obviously by this exchange had likely at least fucked. I'm pretty annoyed about his hollering but at least equally annoyed that my GF is still in contact and receptive to him.

How would you react? My immediate reaction is "who the fuck is this guy?" but I don't see that as the best approach. Thanks guys.

EDIT- not that anyone gives a fuck, but I realized I'm a total idiot. His message said "buy me a ticket for the DAY before" because it's a 16 hour flight. Nvrmnd.