Katie Price has asked her lawyers to write to Channel 4 after comedian Frankie Boyle made a "vile" joke about her disabled son.
Katie said she was seeking legal advice after Boyle made comments about her son Harvey, who suffers from septo-optic dysplasia and autism, on his show Tramadol Nights.
In a statement on her website, she said: "Harvey Price is a little miracle. Every day he overcomes so many difficulties with the help of family and medical experts and has so many tiny battles to win due to his medical problems.
"If Mr Boyle had a 10th of his courage and decency he would know that to suggest, let alone think funny, that Harvey may sexually attack me is vile and deeply unfair.
"To bully this unbelievably brave child is despicable, to broadcast it on television is to show a complete and utter lack of judgment."
A message at the beginning of Boyle's programme, which was broadcast on Tuesday night, warned viewers the show contained "very strong language and uncompromising adult content".
A Channel 4 spokeswoman said: "The joke aired in the context of a late-night comedy show. The joke itself has been performed by Frankie as part of his stage show and, as with much of his material, is an absurdist and satirical comment on high-profile individuals whose lives have been played out in the media."
In a statement, Katie's lawyer said he would contact the broadcasting watchdog Ofcom if Channel 4 did not apologise.
Mark Bateman said: "Channel 4 have got this horribly wrong if they think their actions are defensible because Boyle is high-profile or because he has made this so-called joke before."