DailyMail.com has obtained copies of the lawsuit, filed in 2000 by Mary and Fred Trump III, the children of Donald's deceased brother Fred Jr., for wrongful termination of medical benefits and coverage. After providing health insurance for decades, the Trump family 'unilaterally' canceled it 'maliciously and without excuse or justification', the suit claims.
In the legal papers Donald, his brother Robert and their sister Maryanne laid out their reasons for refusing to pay for the healthcare of their disabled infant nephew William - Fred Trump III's son.
The Trumps argued that siblings Mary and Fred Trump III had already received millions of dollars from them and should be thanking them for their generosity.
Rather than suing them a 'thank-you would be extremely appreciated', they wrote in their response to the suit.
The Trumps even claimed that baby William didn't actually need 24/7 care - which they dismissed as 'expensive baby sitting' - despite his frequent seizures.
Instead of hiring a nurse, Fred III should take a CPR course from the American Red Cross in case William has another cardiac arrest and resuscitate the boy himself, according to the Trumps.
In a scathing passage Mary claimed: 'For the defendants to threaten the health of a 10 month old infant in order to try and force a settlement and thereby cover up their own duplicitous conduct is obscene.