He asks "Do I know you"
She says "Yes I think your the father of one of my children"
He gulps, remembering his one and only act of infidelity, then asks " are you that stripper i had on the pool table on my stag do while your mate whipped me?
"No" she replies "I'm your son's English teacher"
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)