Keeping secrets is not all fun and games, as they say, but it does bring up interesting ideas for stories. 
Who knew that nice young man at the shop killed three people?
Who knew that teenage girl lied about her teachers to get better grades?
Who knew that grandma stole jewelry using her electric wheelchair as a getaway vehicle?
And who knew keeping secrets could be so stressful?
The following short story deals with a secret. Enjoy! 
Oh! You can jumpstart your own story with the title to this one:

​                                                        “I Know I’m Supposed to Keep This a Secret, But…”
 
I’ve waited for this trip to Hawaii for a long time. Too bad my cousin was not available to go along with me. The beaches were supposed to be better than ours, so they say. The crystal clear waters allowed people to swim along with many sea animals. The wonders of nature were expecting one happy tourist.
I relaxed my head on the travel pillow I blew up while I waited to board the plane. My seatbelt was fastened, and the plane lifted off the runway into a crowded, clouded sky. This part made my insides tumble. Lift-off always did. At least the destination was free of complications, so the pilot states.
As the plane steadied itself, and the flight attendants did their thing, I took a deep breath for a nice long nap. That was until my neighbor tapped me on the shoulder.
“Excuse me.” The girl with peppermint glasses turned to me. 
She had been watching the stewardess the whole time we got on this plane. This better not hinder the quiet.
“Yes?” I sighed.
She leaned closer, and whispered in my ear, “I know I’m supposed to keep this a secret, but I absolutely must tell someone.”
Oh, God. She’d better not say I reminded her of someone.
“This plane is not heading for Hawaii.”
“What!?!” I sprang from my seat, but the seatbelt restrained me. 
“Sh, please, I don’t want to cause a scene.” She waved her hand.
“I’m sorry. A minute there I thought you said this plane was not going to Hawaii.”
“That’s right.” She licked her lips.
The sentence she dispersed from her lips hadn’t sunk in my brain. Her tight round face looked satisfied, as if her nuance halted some indigestion. However, she neglected to give a reason for the change. Why should I bother? She seemed a little tipsy. Yet, what if she’s right? Did I accidentally board the wrong plane?
“Well?” I asked.
“Well, what?”
“Where is this plane heading?”
“I’m not supposed to say.” Her eyes shifted. “I could die.”
Heaven forbid this girl to die!
“What are you trying to pull? You obviously need medical attention-” 
A voice blasted through the speakers: “Passengers of flight 007. Welcome aboard! Please buckle yourselves up and allow us to transport you to dimension Westcorph. It was a lovely Earth, but it has outlived its usefulness. No need to become hostile. Just fasten those seatbelts and prepare for our stop in minus 30 seconds.” 30, 29, 28…
I looked back at the frantic passengers. The flight attendants put on gas masks! They held laser weapons in the shape of torpedoes. After an explosion that shook the plane and left vibrations in my teeth, the girl tapped me again.
“I told you so,” she scoffed.