Tristan Thompson shares a sweet photo of his son Prince, 8, hanging out with his son Tatum, 3, and daughter True, 7, at Tatum's birthday party.

Khloé Kardashian shares her daughter, True, and her son, Tatum, with ex Tristan Thompson. Here's everything to know about ...

In the first picture, the father-son duo posed together, throwing up the peace sign, as they twinned in matching white shirts ...