"No one is looking big sis," he said smirking slightly as he stroked it slightly displaying it for her "I mean I wont tell...if you wont," he grinned as he watched her. He could immediately tell that she was turned on just by the way she looked and her nipples standing out from her shirt "After all I'm backed up with a lot of cum." He watched her closely and couldn't help but smile at her nervous fidgeting "If its so wrong then why are you blushing?" he asked "Why are you still looking at it?" he asked. He began stroking the ten inch cock that had been hidden in his pants.