Lisa paused as their mother joined them on the bed, picking up her sister's head and began kissing her with the same suprised passion she had been using.  This was no motherly peck....what she was witnessing was the same tongue deep in the mouth, lip locking that she herself had been doing before Claire entered the room.<br/>At first Lisa hesitated, looking up and watching for a minute.  After she realized that their mother had no interest in breaking up their erotic play, she continued to feast on her younger sister, snuggling in between Cassie's thighs and started licking and sucking on her pussy lips....