The fact is, Chuck thinks Penny is Andy's girl, and so his apparent indifference is really masking his ardent passion for Penny, a passion which can only be contained for so long. Their mutual feelings exposed, the couple are surprised by Andy, who appears to have been hiding in the undergrowth, but it's fortuitous that he is there - he is able to quell Chuck's concerns that he will be seen as stealing Andy's girl. The truth is Penny and Andy mostly hang out to keep the wolves away from Penny and to keep Nina away from Andy. However, Nina's watching everything from a distance, and from her perspective Penny has first moved in on Andy, and now Chuck, both of whom were Nina's targets for romance.
Nina's jealousy is about to get really out of hand. Andy goes missing on a test flight to Hawaii, and Nina produces a note she apparently found. It's addressed to Andy from Penny, and it's contents lead to the unavoidable conclusion that there was a relationship between Penny and Andy and that she was just playing Chuck. Nina leads Chuck to the interpretation that Penny's actions towards Andy were so heartbreaking for him that he deliberately took his own life by downing the plane on the way to Hawaii. Chuck falls for it, and cold shoulders Penny, who can't believe this Jekyll and Hyde transformation that has occurred in the man she was planning to marry. This is pure revenge on Nina's part, since she's not getting either man by this action. As the title suggests - she's acting purely out of spite. Penny's hurt big time, just as Nina hoped, and Penny and Chuck go their separate ways, only to meet up again six months later routing out of Seattle. Hostilities resume, and both are keen to end this new phase of contact as quickly as possible.
This job takes them to Honolulu, though, where all of a sudden Chuck starts acting mysteriously. He wants Penny to come and meet an old friend at the hospital, and it turns out to be Andy, who has just been rescued from a tropical island where he's been languishing for the last six months since that new plane he was testing hit an albatross and went down in the Pacific. His unanticipated vacation ended when he was picked up by a passing yacht (and therein lies another romance comic tale I'm sure - yachts, yachtsmen, daughters of rich guys, etc.). Chuck brings the note Nina gave him out into the open, and it is quickly identified by Andy as a forgery. Penny now understands what has been behind Chuck's bizarre behavior. Chuck realizes what a fool he's been. Luckily there's enough love left for everything to be fixed, and Andy ends with a classic line: "Hey Nurse! Quick! Before there is another relapse, administer a minister". I think this one would adapt well to the stage!
It just goes to show that the high-flying world of the airline stewardess can be full of intrigue, venomous envy, and fast-paced, highly emotional shifts in circumstances. I wonder if Penny stuck with her career or whether this was the cue for her to exchange her uniform for an apron and maternity dresses. And what about Nina? Did she spend the rest of her working life bitter, miserable, and resentful of others' happiness? And Andy? Looks like he was the confirmed bachelor. But it was all so long ago. They'd all be in their 80s and 90s now if any of them are still alive.
Note: These scans are refurbished from the file on the Golden Age Comics Download site, which makes available copyright-expired scanned comics for study and appreciation by discerning members of the public with a penchant for high art.