Tristan Thompson taking 'full responsibility' for fathering another child during apology to Khloe Kardashian

Tristan Thompson has admitted that he fathered a child with fitness model Maralee Nichols while he was in a relationship with Khloe Kardashian after undergoing a paternity test.

The basketball-playing serial cheater took to his social media on Tuesday to confirm the news. "Today paternity test results reveal that I fathered a child with Maralee Nichols," he admitted in the excerpt, and added a groveling apology to the 37-year-old reality star, writing: "You don't deserve this."

The admission posted to Instagram marked the first time the Sacramento Kings player has publicly acknowledged he's now a father of three.

Tristan shared with his fans on Monday: "Today paternity test results reveal that I fathered a child with Maralee Nichols. I take full responsibility for my actions. 

"Now that paternity has been established, I look forward to amicably raising our son. I sincerely apologize to everyone I've hurt or disappointed throughout this ordeal both publicly and privately."