Presumably, the man Dawn called is her new boyfriend. She does not give Johnny details about him because she is afraid of what Johnny will do, possibly because of what he has done in the past. However, although Marky might be in better hands with Dawn than with Johnny, Dawn’s cocaine use suggests that she lives a similarly destructive lifestyle. Meanwhile, Johnny's refusal to take Marky to the fair demonstrates that he is more interested in helping himself than his son.