It isn't if it's your sister.(Well it is but...meh)

You slowly sneak out of the shower and rush to Crystal's room naked. You quickly get into her bed and start stroking your rod. It's hard as diamonds in just seconds. You grin and wait for your sister to come.

The door slowly opens and Crystal walks in. She looks at you and yelps.

"WHA... WHO THE FUCK ARE YOU SUPPOSED TO BE?!!" She shouts.

You get off her bed and come to stand in front of her."Why can't my sisters recognize their sweet little Dougie today?" You speak in sickly sweet voice.

"Doug? I...wh..what happened to you.? " She stammers, clearly confused.

"Well,if I were you,I'd be worried about what's going to happen to you." You grin and grab her by the shoulders and shove her against the wall.

"What...NO!! LET ME GO!" She tries pushing you away but can't push your newly strong body.

"The more you struggle,the more..."*WHAM*.

Crystal headbutts you though it seems like it hurt her more than it did to you.

"That...was a bad move. You're gonna wish you didn't do that." With that you pounce on her and start tearing apart her clothes forcefully. Crystal weakly pushes at your hands but seems a bit dazed by her headbutt. You quickly get her naked before lifting her up like a sack of potatoes.

"Let me go!! I'll scream if you don't." She was yells,while hammering her fists in your back and kicking wildly.

"Oh I very much intend to make you scream sister dear." You tell her and spank her ass with one hand.

You throw her onto the bed and quickly jump on top of her. You place your cock in front of her mouth as you straddle her stomach. She refuses to open her mouth.

"Look we can do this in two ways. The hard way and the easy way." You tell her while slapping her cheecks with your cock. She stares defiantly at you and keeps her mouth shut.

"The hard way it is then." You sigh and bring your hand up to slap her hard. You swing your hand and deliver a mighty slap and you can literally feel her jaw clattering with the ****. When she opens her mouth in pain you ram your cock down her gullet. She frantically squirms below you, slapping you with both hands but you keep pushing your cock deep in her throat.

Crystal tries biting down on your cock but you pinch her nose closed.

"Look. You don't have to make trouble for yourself. Behave like the cum dump you are and I promise to make this as painless as I can." You say and release her nose. You slowly start facefucking her tight throat and Crystal keeps squirming. However,after few minutes she slowly stops protesting and lets you do whatever you want. You keep ramming down her throat mercilessly. Tears streak down Crystal's face as she surrenders to you.

This makes your twisted mind go white hot with glee and you explode deep in her throat, filling up her stomach. You cum for two minutes straight before pulling out. Crystal immediately chucks out the remains of her stomach,which is basically cum. Lots and lots of cum.

You don't stop at this. Seeing her distracted,you quickly get behind her and flip her onto her stomach you line up your cock with her virgin pussy and thrust inside in one single go, tearing through your second womanhood of the day. Crystal screams out at this and tries escaping but you lift one leg and press it down on her head, forcing her down. You start pistoning your cock in her no longer virgin pussy with reckless abandon.

"WH..WHY..AR..AR...ARE..YOUUUUU....UH...UHHH...UHHH...AHHHHHH....DOINGG....UNGHH..UNGHH....THISSS!" Crystal cries out as she sobs into the mattress,your leg firmly pushing her face down as you fuck her doggy style.

You feel the cum boiling in your balls and you hit her cervix and cum again. The **** from what you cum almost makes her go flying but you hold her in place. Strangely,Crystal cums too. From her pussy and dick at the same time.

You look at that and smile. Maybe she really liked it.

"Dear sister,you don't even know how much you're enjoying this." You grin as you pull out.

Crystal just sobs with her ass in the air. Cum leaks out from her pussy onto her thighs.

You sigh and lift her up in sitting position."Look Crystal,I love you and I'm sorry for this. But you need to know that you can't deny me. I am the new Alpha here. If only you'd complied like Sarah,this would've been so much fun."

Crystal looks at you,still sobbing,"Ss..sarahh?" She asks.

You nod."She loved it. I won't have more with you unless you come to me for it. Love you sister."

You walk out of her room.