When Dorien begins acting even more strangely than usual Sharon and Tracey begin to suspect that she is rapidly approaching "The Big Seven-O" and decide to celebrate the event, whether she wants to or not.
After Dorien is stopped by the police whilst giving Travis a driving lesson and required to reapply for her driving licence Tracey and Sharon deduce that she is approaching her seventieth birthday. They decide to throw a surprise party for her, involving a policeman who doubles as a stripper-gram but initially the prospect of getting older depresses her. However after a pep talk from her two best friends she cheers up and they all celebrate in style.—don @ minifie-1