Darlene gets The Talk from Pearl.
Darlene is the name of one of the lost Space Children who encounter Pearl, Bobo, and Observer on the Camping Planet. She first appears in Episode #811. Darlene is played by Bridget Jones. The role is credited only as "Space Children", along with Scooter (played by Paul Chaplin) and Buddy (played by Michael J. Nelson).
Darlene and the other Space Children were very powerful, and their exact origins are unknown. Their childish nature annoyed Pearl and Observer, but Bobo found them delightful.
The Space Children were eventually returned to their parents (in Episode #812), who were grateful to Pearl.