I've made out with Kim in my own body enough times to be pretty desensitized to sibling stuff, but the feeling of being in Ken's body locked in a French kiss with his sister was enough to instantly get me hard again. I caressed Cass's body as her nipples hardened even further under my touch, the her scent was sending me crazy.
"Ca- Sis, I want to put it in," I said desperately losing all reason as I was trying not to cum again from just kissing her. Cass smiled a perverted grin as her hand traced up and down my stiff cock, making my whole body shiver with pleasure.
"I know you do bro," she said putting emphasis on the last word before straddling me and putting my dick between her warm soft thighs, "but you'll have to settle for just this." Cass began to give me a thigh job all the while the warmth of her pussy tickled my dick. Probably within 30 seconds I had shot my load all over Cass' legs.
"F-fuck I don't know how he lives like this with you. If I were him I would've molded your pussy to the shape of this cock by now," I sighed as I took a breather.
"Well," Cass explained, "we had this rule since we learned about our powers so I'm sure the thought never even came to him." Cass began stroking my dick again, "you can't go tapping out now bro, your second girlfriend over there needs some dick as well. This time you can put it in an actual pussy."
Kim smiled sweetly as she approached me and shooed Cass' hand off my dick. "Let big sis take care of you now," she said in her motherly voice. Before I knew it my cock was rock hard again. Kim winked at Cass, "the mommy voice always does the trick," she giggled as she spread her legs and positioned her pussy right over my dick.
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