Sir! I've wet my knickers!

Description: It is my turn for school knickers inspection and you can tell straight away by my nervous excuses and prevarication that i have something to hide.  when asked to assume the inspection position the reason becomes eminently clear; i have et my knickers!  i am mortified but you have me hold the position for quite a while, chiding me for letting this happen.  you have me remove the offending knickers and hold them out, to humiliate me further before announcing my punishment.  i am to leave my knickers in the inspection room and go and write lines. with my skirt up and no knickers, i feel very exposed as i sit to write lines.  you read out the line to me 'i am a naughty girl and am far to old to wet my knickers' and tell me how many times i must write it out.  as a further humiliation i must say each line out loud as i write it.  i am near tears!  finally i complete my lines and think it is all over but you send me to matron to have me fitted with plastic knickers.  i am mortified as everyone at gym will see them and know why i have been made to wear plastic knickers.  the shame of it!