United Kingdom, May 28 -- Tristan Thompson had a vasectomy following an "ultimatum" from Khloe Kardashian.

The 35-year-old basketball player has Prince, nine, with former partner Jordan Craig, True, eight, and two-year-old Tatum with ex-girlfriend Khloe and Theo, four, with Maralee Nichols, who got pregnant while he was still in a relationship with the Good American founder.

And now the sportsman has admitted it is entirely in Khloe's hands if he becomes a father again in the future.

Tristan was a guest on his ex-girlfriend's podcast, Khloe in Wonder Land, and was asked: "Do you wanna have more kids in the future?"

He replied: "I think I signed off for two embryos. So, I mean, if I do have more kids, it'd be coming from you. I already...