General description - sounds like they are at someone's house for a meal, John said he had to go eat. The 12 year old sounds young, age is unverified except John saying "no 12 year olds" most likely referring to them going to smoke weed without her. The 12 year old answered the phone after redial, explained that John said "he really needed to smoke weed so that's why he couldn't answer the phone". John is also apparently doing "the pee pee dance" where it goes up and down". Kid also explained that John is attracted to people who have a penis and a vagina at the same time. John is supposed to drive her home (not sure why John has responsibility over a child) but is getting stoned, it clearly worries the kid. Kid then says they met in a bathroom because she loved Rexy, who "she kissed" - most likely referring to Rexy licking her face - but ends the call by saying John "won't let her marry Rexy" because John has a crush on Rexy. She ends the call by saying John "keeps touching Rexy's peepee"
Taken at face value, fuck. This poor little girl is either a cunning troll or is so groomed she calls something "the pee pee dance. You know?" Like we are supposed to know too.