Tristan Thompson has been accused of ignoring his oldest son, Prince, 6, after he was showered with praise for his parenting skills on a recent episode of the Hulu reality show The Kardashians.

The NBA player, who recently signed a one-year contract to reunite with the Cleveland Cavaliers, was called out for his appalling and inexcusable behavior by the sister of his ex, Jordan Craig.

On Thursday, Kai Craig shared a lengthy Instagram post accusing Thompson of ignoring Prince and seemingly showing more support for his other children and young family members of his more recent ex, Khlo Kardashian, than his firstborn child. Thompson and Kardashian share a 5-year-old daughter, True, and son, Tatum, 1.

Kai Craig called out Kim Kardashian for appearing insensitive since the Skims co-founder was filmed boasting about Thompsons presence in True and Tatums lives and the lives of her own four children, whom she shares with her ex-husband Ye, the rapper formerly known as Kanye West.

It has been so hard to refrain from speaking up, and out of respect for my sisters privacy I havent for over 7 years, but this is just too much, she wrote in the statement. Its so painful to see how Tristan can find the time to do these nice things for others but cant seem to show up and be a real parent for my nephew Prince.

She continued, The fact that he can take other children to school and activities in the same city, yet never sees or speaks to his own son, unless its for a party or planned photo opportunity, is appalling and inexcusable.

Kai Craig then directed her attention toward Kim Kardashian, saying that Thompson literally ignores his children.

Thats nice if hes been a good friend to you, but lets consider our sisters before taking to global platforms to defend this mans character, she said.

She then charged that Thompson had long stopped paying the amount of child support that had been previously reported and that he had also allegedly stopped paying Princes school tuition.

He hasnt even inquired where Prince goes to school now, she said before noting that her sister works multiple jobs.

Then Kai Craig added, [Tristan] you are NOT a good father if you cant be a good father to ALL of your children.

A representative for Thompson has not immediately returned a request for comment.