Pina, 33, had not shared that she was pregnant before revealing she suffered a pregnancy loss.
The pair had met through mutual friends in 2019.
After Windham-Burke’s relationship with girlfriend Victoria Brito, who she dated from late 2021 to June 2022, she and Kris seemed to rekindle their relationship.
They are parents to five children- Justin, 17, Gabriella, 14, Jacob, 12, Christian, 10, and Olivia, 9.
She is due in winter but is going to keep the baby’s sex a surprise.
The ex-couple share three children together- daughter Aspen, 4, and 2-year-old twin sons, Hayes and Hart.