Mouth

I can't let her win... you thought with the last of your willpower "My mouth!" You blurt out

"Hmm?"

"P-please fuck my mouth..." You repeat

"I'm not sure if you mean it..." She teased "Could you elaborate a little?"

You felt your face burn as you did as she said "Please punish your fucktoy's dirty mouth until you're satisfied"

"That's more like it" She stands up off the bed and faces you, her cock springing fully erect. Your hands still bound and your clit still yearning for release, you weakly climb off the bed and kneel in front of Gwen and get an up-close view at your sister's cock.

So this is what a blowjob looks like for a girl you thought. You swallow nervously as see it throbbing slightly, with a bead of pre-cum at the tip. Your eyes wandered down from the purple tip to the thick shaft, settling on her large smooth balls, full of potent sperm no doubt. You know that you should be disgusted at the thought of sucking another dick, but all you can focus on is your need to get some release. You lick the tip tentatively, and feel your whole body shiver in response as the throbbing in your crotch suddenly got worse.

F-fuck... damn that bitch witch! You silently cursed. It wasn't enough to make you crave cum in your lower mouth, she had to crave it in your upper mouth too. Juices start to leak from your pussy, forming a thin line to the floor as you open your mouth and take her inside you. You try your best, but you can barely fit her inside your mouth, and you end up bobbing up and down lightly as your tongue swirls and teases the tip.

"Sorry but that won't be enough.." You hear her say as she grabs your hair and pulls you off her cock. "Take a deep breath sis!" and before you could react she forces your head down onto her cock as deep as she can go. You instinctively swallow as your **** to take her full length inside you at once. You feel your throat spasm around the intrusion and feel your sister's knees buckle.

"Nnnng... your mouth feels so good~ I love the way your throat squeezes me.." She loosens her grip and allows you to pull back for a breath, before pulling you back down again, repeating it faster and faster until she was truly fucking your mouth. There was nothing you could do to escape the face fucking and worst of all, you were more turned on than ever. There was now a wet patch between your legs and soon you were willingly taking her cock, your checks hollowing as your tongue swirled round her shaft.

"F-Fuck... Cumming~~~" She held you down on her cock as tightly as she could, her knees buckling as you swallow rope after rope of semen, savouring the hot feeling as it goes down your throat. She holds you there for over ten seconds seconds, pumping her hot seed directly into you, before letting you go. "Good girl.." she pants . She strokers her had as you swallow the last of her cum, her cock starting to deflate in your mouth.