fuck his sister

Ok, honey, we have to get her to become like us, so we can fuck her too said mikes mother in a husky voice.

I know mike said, with a grin on his face.

they both started walking towards his sister's room and the whole way there mike was fingering his mothers pussy, it seemed swollen somehow bigger meatier and was gushing juices all over his fingers and floor.

then they reached her room they cracked the door open and looked in, Susan was sitting at her desk doing homework and didn't notice her brother and mother watching her with lust filled eyes.

mike looked her over from the door and got a raging boner just by looking at her, her name was Susan and like her mother she was beautiful she had big tits dd size and a slender figure with curves in all the right places, her ass wasn't as big as his mothers but he knew that would soon change.

sneaking into the room his mother walked towards his sister and grabbed her tits and started squeezing them.

startled Susan turned around and saw her mothers face a maniacal grin, but something was different about her she thought she looked pregnant and her breasts were bigger and she looked overall sexier.

wow, what are you doing Susan said while trying to back away from her mother, but she was close to her desk and bumped her ass against it.

oh her mother said while smiling towards her, did you bump your sweet ass against the desk, turn around instead so your brother can shove his cock up your ass.

whats wrong with you mom said Susan while squirming in her mother's grip, she saw her brother walk into her view with his throbbing cock out, it was oozing some green slush, and as her mother, he had a manic grin on his face.

n nnnn no she stuttered, let me go we can get you some help, you just need to snap out of it.

ohhh, but sis wouldn't it be much better to have your holes stuffed mike said.

before she could respond her mother showed her giant breast in her mouth and **** her to drink, she struggled first but while gushing down the sweet milk, she began glancing at her brother's dick and started wondering why she shouldn't have it up her ass, its only natural she fought.

mike could see her sister willingly began to drink bigger and bigger chunks of milk, and he could see her looking more and more at his dick, smiling he moved closer to her and began stroking his cock, she turned her ass slowly towards him while blushing a lot.

he showed his dick up her ass hard and began fucking her fats and felt he was close to cumming just from entering her, as soon as he came inside her he could feel the parasites entering her body and taking over, she suddenly started fucking back against his dick and started fingering her mother, she moaned loudly while her brother fucked her ass.

mike could see her ass expanding and snapping her jeans apart, and her breasts also expanded rapidly and began flowing with milk, mike could see her belly expanding along with her other body parts and smiled broadly and started laughing hysterically.

they continued fucking for a while longer until they heard the doorbell ring downstairs, and looked at each other manically and began walking toward the door and was planning how to infest this new person. all while having removed all their clothes and were gushing pussy juices and cum.