Your sister needs your help

You're just about done sniffing around in your mother's drawers when you hear her coming up the stairs. You sprint to your room and close the door as quietly as possible.

With heavy breathing, you lay on your bed and try to process the new reality. Your thoughts get interrupted by a knock on your door.

It's your sister. After you pranked her after she showered, she went to her room and got dressed. Now she was wearing a white tube top, a pink bow in her hair, a black garter belt, and pink stockings. In her hand were the same pink panties you stole from her earlier.

"Don't even think I forgot what you did earlier, but since you're the only male in the house can you help me put in my panties?", she asked and threw the panties over to you.

You get up from the bed and watch her bend over your desk. She's incredibly sexy with her long and slender legs. Between her taunt asscheeks is a pink gem, inviting you to look at her holes.

You can't imagine your sister to have nearly the same size buttplug as your mother but you assume that your cock would fit quite easily in her asshole. Her other hole is slightly spread because she has her legs are quite far apart.

After you take your cock out, you walk up to her and line it up with her pussy. You almost forget that you need to push the panties inside, otherwise, it might count as ****.

You drape the panties over your cock and push it inside. Your sister moans and tries to relax her cunt. The resistance is quite high because the is not very wet and even if it were, the panties would probably soak up all the moisture anyway.

You push and push until your shaft bottoms out in her pussy. You pull back and see that most of the panties are being dragged out again. You bunch them back up in front of her pussy and push your cock back inside.

After a few more pushes, the panties are completely inside and you make sure that you give her pussy a few hard thrusts to make sure the panties are deep inside her love hole.

"Took you long enough, perv. I'm going out to the cinema now. Don't even try to sneak into my room. I made sure to lock the door", she said and showed you the key to her door.

She turns to leave and you make sure she doesn't see your grinning face. Many years ago you made a copy of her key from wood and you are sure that she didn't change the locks.

You hear her running down the stairs and you walk over to her room. With a click the door springs open, and you can still hear her talking to your mother downstairs.

"Nice try sis", you think to yourself as you enter her room and close the door behind yourself. You're not very often in her room so you take a few seconds to take in the room.

The room is brightly lit by the sun and the entire room is shining in a yellow hue from the yellow paint on the wall. You didn't really expect it but you see that your sister is not as clean as you thought she might be because you see a pile of dirty clothes on the floor. There are also at least 3 different buttplugs scattered around the room, all much smaller than your mother's. You pick up one of the worn panties and can't help yourself taking a deep sniff. They must be quite fresh because her scent is strong.

You put the panties in your pocket and continue looking around her room. To your surprise, her laptop is not locked. Maybe you can find something spicy in her browsing history or the synced iCloud pictures.