Sure

You do remember Mabel crawling into bed with you after a bad dream. You remember her crying a few times when it happened and you just couldn't say no. You still couldn't say no, not sure what she's had to deal with during this hell. You scooch over and lift up the blanket, Mabel smiles and crawls in, snuggling up next to you and wrapping her arms around you. You put an arm around her and get comfortable. You haven't shared a bed with a girl since that woman you dated for a bit back in Seattle. It was a nice feeling, but you have to remember that this is your little sister. After a bit you manage to drift to sleep.

You wake and you feel a strange and pleasant feeling around your crotch. Someone was blowing you. It was sloppy and inexperienced but still it felt nice. You moaned as you felt the mouth swallow your dick whole. You heard whoever was doing this to start to gag. She took your cock out of your mouth and began coughing. You take the opportunity to look at the person blowing you and to your shock, it was Mabel! You sit up to see you and Mabel naked in bed and Mabel had her hand around your cock.

"Mabel!" you hiss. Not wanting Mom and Dad to wake and walk in on this scene.

"Hey, John," Mabel says with a rough voice, her hand still wrapped around your cock and she begins to jerk it off.

"Wh-what are you doing?"

"We're having sex," she says simply.

"What?! No we're not!" Mabel sighs before climbing on top of you. You want to push her off but she quickly lays on top of you with her stomach. You feel her breasts press into chest and your cock head just slightly pressing against the entrance of her pussy. Her arms wrapped around your chest tightly so when you finally tried to push her off, she wouldn't budge.

"Listen, John," Mabel began. "I'm an adult now. Dad's been doing his best to keep me from getting my hands dirty while everyone else has been busting their backs and their junk since day one. I know I'm going to have to start helping out by tomorrow. And that's probably going to mean I'll have to start pussying out. You know that you and Luke were the only boys dad would let me hang out with by myself, so naturally I'm a virgin. And I don't my first time to be taken by some mindless zombie." As she talked she subtly grounded the opening of her cunt onto your cock. You could feel her pussy getting wetter, and you fear that the tip managed to slip in.

"So you want me to fuck you? I'm you're brother! Why can't you go after Gary or Arnold?"

"I don't like them."

"And that leaves you **** enough to try and get me to do it?" Mabel said nothing else. Instead she nuzzled her head in the crook of your neck, and then impaled herself on your cock. You grunt at the sudden tight and pleasant sensation while Mabel does her best not to scream. Her arms tightened around you as she endured the pain. "You... you really just did that..." Ignoring you Mabel kept breathing heavily. And then she began moving, slowly fucking herself, using you as a dildo. "This is basically ****..." you breath out as un-welcomed pleasure began to infect your body. "D-don't think I can't be **** just because I'm a guy..." And with that note, Mabel silences you with another incestuous kiss. This time she manages to push her tongue inside and you both begin to make out.

"Shut up..." she breathed out, breaking the kiss. "We both know you're enjoying this. Now stop fighting it..." Mabel kissed you again and it quickly became another make out session. You couldn't deny the pleasure any longer. You gave in to it and wrapped your arms around Mabel and you kissed her harder.The two of you flipped over, placing you on top and you began drilling your dick into your sister's pussy. Each strong thrust makes Mabel give out a little squeal inside your mouth. You're so lost in pleasure that you didn't realize you came inside Mabel until you felt exhausted and Mabel's cunt felt wetter. Mabel let out a low moan in your mouth meaning she came as well.

You break the kiss and look at Mabel, contemplating what the two of you just did. Mabel looked at you with a face that literally screamed "fucked silly". Seeing that look on her face and knowing that you were the one who put it there, gave your softening dick a second wind.

"I didn't pick Gary or Arnold because I don't like them," Mabel said in between pants. "But I like you... but... not as a... brother..."

"..."

"I've felt this way about you for a while, I didn't want to say anything because I know how this isn't how siblings should feel. I... I understand if you think I'm a freak or something..."

"I don't think your a freak," you reply. "It's just... I don't know what to think of your feelings... and I really don't think I can return them..."

"I know. I didn't expect you to fall for me. I just wanted to get this off my chest, it's been bugging me for a while."

"...How do you feel know?'

"You mean other than the feeling of getting your brains fucked out?" she giggles a bit as you blush. "A little relieved that my feelings are out in the air."

"Well... good. I don't want you to feel bad... Uh... What now?"

"My other hole."

"Excuse me?!" Mabel pulled out and flipped to her belly. She looked at you with sultry/shy eyes. Mabel got onto her hands and knees, pointed her cute heart shaped ass at you, and spread her ass cheeks so you could see her cute little rosebud.

"I meant what said when I said I'll have to start "working" tomorrow. And I know that zombie's will go for this hole as well, so I really need you to take my virginity in this hole as well. If a zombie decides to take it while I have no experience, well, I really don't want to think how that'll feel..." You knew this wasn't just her lust for you, and her fear was just. You knew how painful it was to be **** up the ass by a zombie. The sex itself is able to distract you from the overwhelming pain but afterwards the afterglow was red and sore.

Besides, you already crossed the line by taking her virginity, even if she **** herself on you. Might as well go all the way. You position your cock at Mabel's pucker. Your cock was still coated in her pussy juice so pushing in was a bit easier then it should've been. You felt yourself enter her ass. Mabel buried her head in your pillow and let out a muffled scream.

"A-are you okay?!" you ask.

"Y-yeah... just give me a minute..." You wait and let Mabel catch her breath. She's then on all fours and begins to fuck herself on your dick slowly. You then start to slowly match her movements and push yourself deeper into Mabel's rectum. Each small, slow, thrust makes Mabel gasp slightly. After a while you gain speed and Mabel is now openly moaning into the pillow as you fuck her asshole. Eventually you feel the all too familiar feeling of an orgasm going through you, and you figure what the hell? and you cum inside of Mabel's asshole. Mabel letting out a low moan and cumming as well.

You two collapse onto each other, you on top of her. Mabel manages to give you a quick kiss on the lips before you pass out.