Khloe reportedly gave birth at Hillcrest Hospital on April 12, just days after Thompson, a Cleveland Cavaliers player, was accused of cheating on Kardashian with a number of women.
After the allegations surfaced, Kardashian's family rallied around her.
"Tristan is a man Khloé built a life with and saw as her forever. Khloé’s mother, Kris, flew to Cleveland to be with her and support her in whatever she needs," a source told Entertainment Tonight.
On December 20, one day after she accidentally Snapchatted her pregnancy pillow, Kardashian confirmed what the whole world knew already: she's pregnant.
"I know we've been keeping this quiet but we wanted to enjoy this between our family and close friends as long as we could privately," she wrote on Instagram at the time. "I am so thankful, excited, nervous, eager, overjoyed and scared all in one!"