My husband's sister was seducing me. All day I helped her shop. I felt she was anxious for me to assist her in the fitting rooms. She has a boyfriend and I am married so it's me thinking crazy. It was only my imagination until she stripped down and gingerly slow walked a tight sheer thong up and on. Then bending over to practically grab her ankles she stares back at me from between her legs. Our eyes lock, she giggles, and politely says, Ben's going to love these. Who could not admire such a tight ass, perfect tits, trim tummy, long legs, pretty smile, silky hair, and the total knockout beauty queen. She was too polite, sexy, and developed to be sixteen. When she turned and moved closer I was sitting with this bald camel toe in tight see through just before my eye balls I wondered if women really do eat pussy better then guys. I wanted to kiss and touch her. My ideas got worse as she tugged the panties for a better fit. Then her other hand slid accross the mound. I felt tested and relapsed into recalling how her touch was always so tender. Then I imagined her touching herself alone and naked. Her flirts had to be intentional and deliberate. She was enjoying me melt and surely sensed the tingles and awe that were flashing through me. The smiles she gave said I know your juices are running and I arouse you. I desired to know if she was also wet. I reminded myself girls are forbidden. Stop, I demanded me. I confess to nasty thoughts, this attraction, lust, and fantasy. Yes, afterwards I masturbated the first chance I got. And now again while trying to resist my imagination. I constantly fight a never before fantasy planted by Abby. I will never shop with her again and wonder what will become the next time we are together. Family visits are frequent. I am having a hard time so I write down this day and pray it helps me figure out what is suddenly wrong with me.