ok, so im really tired to explain everything but basically catalina betrays you again because she is the cause of the ambush at the cemetery and she is now part of vagos and ballas, she runs them now, kendl heards about this and calls you to meet her and see whats going on, after that you can kill catalina or let her go after you need to escape from ls because vagos and ballas are not letting you go easily! truth will greet you back in doherty garage in san fierro, in next mission you need to get kendl from ls to sf here, because she is in danger!