You wake up somewhere new

You wake up and yawn. You wipe a small amount of saliva off of your face and then brush your long red hair away from your eyes.

What the hell, you thought. You find yourself instinctively trying to curse but your mouth doesn't move. Instead, your hands reach up to your chest and slightly adjust the stiff piece of fabric sticking into your side. Your right hand then makes it's way under the waistband of your pants. It felt like you were wearing loose fitting sweatpants, which was weird, because you typically slept in your boxers.

What the fuck! Your hand quickly rubs across your groin where your dick should be. Your finger tips feel wet and it's painfully obvious that your hand was quickly stroking a vulva. Your volva! Again, your try to scream but you find yourself biting your lip. Your other hand reaches the cup of your bra and starts massaging a generously sized breast.

A weird sensation overcomes you. It was like electricity running through your skin and it was slowly growing stronger and stronger. Your heart started to race and sweat started building on your skin. Just when the sensation really started to build.. it randomly faded away

You grunt. You pull your hand from you pants and push yourself up in bed so you are now sitting up, a pillow wedged between your back and your headboard. You recognize the room around you. It was Cassie's room. Your 22 year old sister.

Your pivot your body and grab the cellphone from off of your bedstand. Your fingers swiftly type 7493. The lock screen opens and you see your sister's home screen. The background was a picture of Cassie kissing the cheek of her boyfriend, Tod. You barely have a moment to register what you are looking at before your fingers swipe up and open the app selection screen. You click 'Gallery' and navigate to an folder named "Work - Draft Documents". What you see next was clearly unrelated to work. It was Tod's veiny cock.

God damnit. You bite your lip and run your left hand down your panties while your right hand holds your phone. You start stroking again. This time you turn your hand on its side and slowly rotate the side of your thumb over your clitoris. The sensation from before returns and your heart starts racing faster than before.

You pause very briefly and catch your breath. You put the phone down next to you, pull your bedsheets up so they cover your body up to your neck, then turn onto your side. You place the left side of your face on Cassie's pillow. Feelingly slightly more comfortable and warm, you use part of the pillow to brace your right hand as you start to quickly swipe left and right through Cassie's photographs while your left hand continues rubbing your clit.

You thumb starts to rotate faster and faster. You look at a picture of Cassie's boyfriend exercising at the gym. Then a picture of him in a swimsuit. Your eyes dart between his abs and groin. You find yourself staring at the outline of his dick through a pair of tight shorts. The electric sensation abruptly increases in intensity for half a second. You release a slightly muted, but high pitched gasp, nearly a scream. You turn your head so your eyes and mouth are now completely buried in Cassie's pillow.

Your finger starts rotating faster and faster. Your hand starts to cramp but you don't stop. With your eyes covered your right hand returns to your breast and you start to rub your erect nipple. You scream into your pillow and pray no one can hear you. The electric sensation becomes unbearable. Your muscles spasm before it all fades away.

Exhausted, you flip yourself onto your back and stare at the ceiling as you catch your breath. You couldn't believe what had just happened. Suddenly you body braces itself, pivots to the side of the bed and you agilely hop to your feel. Acting like nothing happened, you casually pull your shirt over your head, and then throw on a black hoodie laying on the floor next to Cassie's bed. You walk out of your bedroom and down the hall to the bathroom, your hand scratching your ass through the fabric of your sweatpants.

You didn't think your sister was serious when she made that bet with you, and you DEFINITELY didn't think spending a day as her would mean that you had no control over your body. Unfortunately, it was barely 8:30 a.m. and you had a long day ahead of you.

Today just happened to be the first day of spring break and Cassie was excited to spend the afternoon at the pool with Tod. He loved to see her in a bikini and she couldn't wait to feel him ripping it off of her in a few hours.