While Treena is the daughter of Mr. Lahey and Barbra Lahey, Treena did not reside inside the Sunnyvale Trailer Park, but instead somewhere else and would come each year to visit Lahey during the summer. ("I've Met Cats And Dogs Smarter Than Cory And Trevor") After Treena's father had let the park go to hell and the barely won the Trailer Park Supervisor election, Barb Lahey decided to allow Treena to stay with Lahey and Randy. This was done in the hopes that Lahey may be able to get himself together. ("I've Met Cats And Dogs Smarter Than Cory And Trevor")