Family Ties/One good fuck and then offer her some more on the trip.
"Heather, we can't do that," You said gently, seeing disappointment appear in her eyes. Leaning up to hug her, you buried your face into Heather's wonderful chest and rubbed her smooth back. "Remember we have the trip in the morning and it'll seem weird if both of us were too tired to go."
You felt her arms hug around your body, pulling you closer. "Alright but just one time? At least for now."
"One time and I promise we could have more while on the trip."
Heather moan in delight and sheath your cock in her pussy, the feeling of her warm insides making you both shiver in pleasure. She bounced up and down on your cock as you took one of her nipples into her mouth, suckling it while pinching the other one. The way her pussy tighten around your cock was countless times better than you ever imagined, making you wish that this feeling would never end.
Your older sister rode you for several minutes while you gave attention to her boobs, doing her best to keep herself quiet to avoid waking up the house. All too soon, you felt the need to cum and knew that Heather was close as well if how her pussy was tightening even more around your cock.
"T-Timmy, kiss me," Heather gasped and looked down at you. "I-I can't keep this one quiet."
You didn't need to be told twice and, popping her tit out of your mouth, you leaned up to capture her lips with yours. Just in time as well as she lets out a loud but muffled moan of pure pleasure as the two of you climaxed. Grabbing her hips, you shoved your cock as deep as you could make it go, feeling it press up against something in her pussy.
A minute passed until you were finally done cumming and both you and Heather stood up. White cum dripped from her pussy and down her long shapely legs, staining her carpet.
She leaned down, both hands gently grabbing your cheeks. "That was wonderful Timmy and I can't wait for more during the trip. Now back to your room, we can't have dad waking up and seeing us in bed together."
The two of you shared a brief kiss and you made your way back to your room. Once your head hit your pillow, you were out like a light. Your dreams were filled with what you and Heather would be doing on the trip, sometimes your mom and twin joining in on the fun.
Unfortunately you woke up from your wonderful dream, your alarm clock showing that it was 7:02 AM and heard the sounds of your family getting ready to leave. Getting dressed, you made your way down to the kitchen and saw your mother in her robe, drinking a cup of coffee with Jacob and Jessie eating next to her. She gave you a bright smile and hugged you, causing your morning boner to become even harder.
"Good morning baby. Did you have a good night sleep?" She asked. You got a bowl of cereal and sat down at the other side of the table, digging into your breakfast.
You nodded your head. "Yup in fact," You said just as Heather came down wearing a midriff white top and a pair of skimpy panties. "I think I had the best night of sleep ever."
Heather gave you a smile and ruffled your hair when she passed by. She came back to the table with a bowl of cereal and sat next to you, her bare legs brushing against yours. You didn't miss how her legs slightly spread apart to show her barely concealed pussy, its outline obvious through her panties.
If that wasn't an obvious sign of what she wanted then you don't know what is. Although you want to finger her, you're worried that your family might notice you pleasuring Heather.
You decide to...