A really fat and ugly woman with two children walks into ASDA and is welcomed to the store by the ASDA greeter "Good morning madam are your children twins?" asks the greeter.

The woman is rather irrate by this "Of course there not twins one of them is six and the other is eight"

The greeter replies "I just thought i would ask"

"Why would you ask?" replies the woman very angrily.

"I cant believe someone would have sex with you twice" replies the greeter.