Yandere females x male reader

Big (step) sister X little brother reader.

(Tis be requested by wild3panda hope ye enjoy lad. P.S. the picture at the top is your big sister. P.P.S all credit to artwork goes to there original creators.)

(Y/n):*sigh* nothing to watch.

I say to myself sitting on the couch I hated being bored expectantly on a weekend the time most people were waiting for yet when it came they had nothing planned. Well almost nothing you thought to yourself yes you had something planned but it was just the time that needed to speed up. You were about to go outside for a jog but before you could even reach for the handle you heard a familiar voice call your name.

(Sisters name= S/n)
(Girlfriends name=Gf/n)

(S/n): (Y/N)! yoohoo~

(Y/n): *sigh* great.

You said to yourself, you began walking to your sisters bedroom and opened the door.

(Y/n): Yea sis?

(S/n): I want breakfast in bed.

(Y/n): seriously?

(S/n): yes!

(Y/n): can't you just make it yourself I want to go on a jog.

She then makes a frown on her face.

(Y/n): no don't do it.

Tears start forming in her eyes.

(Y/n): don't do it.

Finally her lip starts to quiver.

(Y/n): please don-

(S/n): WWAAAHHH!

*time skip*

I am now sitting on her bed feeding her the breakfast I made for her. Don't get the wrong idea I love my sister to death even if we aren't biologically related were still family, even if she's stubborn and needy she provides countless entertainment. (Not like that... Well at least not yet.)
Though I find it hard to believe she's older than me when she acts like a little kid so much and is always getting into trouble.

(S/n): amazing as always (y/n).

(Y/n): so dose that mean I can go yet sis?

(S/n):Aww does widdal (y/n) not wanna be with his big sis?

She said making a puppy dog face.

(Y/n): I mean I do but-

(S/n): then it is settled!

She then grabs me and smothers my face between her breast. To any other guy this would've been heaven hell it still is but you had to remember this was your sister. You got out of her grasp and laid next to her as she wrapped her arms around you.

(Y/n): W-what are you doing.

(S/n): cuddling.

(Y/n): can you let go?

(S/n): no I'm tired.

(Y/n): but it's morning.

Her grip tightened on you.

(S/n): I said I'm tired little bro now let's just go to sleep.

She said this in her serious voice meaning you couldn't really fight back unless you wanted trouble and by trouble you mean a lot of terrible pranks for about a week you shiver as you remembered one time you were taking a shower and then had a bucket of ice water get pored on you.

Feeling her grip loosen snapped you out of your thoughts as you faced her she looked as if she was asleep. You ninjaed your way out of her grasp and slowly crepted out of her room and closed the door.