It was early, Painfully early when his sister came into his room, Rambling on with her current list of problems at school, Only the last part he paid attention to, When she pulled him from his bed, Begging him to pose as her at school. It wasnt possible he wanted to say, No way it would work! And most importantly.. Why? They would of been all valid points he could make, If he could shake the sleepy haze from his head as she pulled him along into the bathroom. He would be in auto pilot for most of her all to convincing speech. His eye's barely opened, Until he felt his sister pulling that barrowed thong up, Allowing it to press deep between his small round ass cheeks, trying to keep his cock from being as visible as possible, His soft, Now cherry stained lips parted as he let out a whimpered moan feeling that silken thong against his length, Digging into his backside, Pulled high over his hips, It wasn't her Ass on the line, She didn't know what she was so worried about! She had made it clear just to go with what ever happend in school and she would reward him with all sorts of naughty things, It was a risk he had to take, a once in a life time chance to do those naughty things to his sister he had only dreamed of. He wouldn't resist, Even as he felt her soft fingers teasing over his shaft, caress his balls as she in vain tried to find that magical position where they could not be seen. She sighed as she got back on her feet, and did some last minute fixes on his hair. Before he even realized it his transformation had been complete. Painfully aware of that teasingly tight Thong the outfit was nearly complete, From those short little uniform shoes that barely came up to his ankles, To the oh so short little skirt that would barely make it past his mid thigh. Finally the time would come, He couldn't help but to nod eagerly along with her instructions, Which would fall mostly on deaf ears. His tummy knotted up just from feeling her hand along his length as she squeezed and worked it to stay mostly hidden, It would certainly be a long day.