Rivera, 28, married the Justified alum in July, only three months after she ended her engagement to Big Sean. The couple announced they were expecting a baby seven months later.
By the time Rivera reached her third trimester, she was ready for her son's arrival. "When I reached the final leg of my pregnancy, I was ecstatic," she wrote. "I could see the finish line and it felt so good. Sure, my back was on fire and I was tipping the scales at numbers I didn't think I could ever reach, but who cares?! WE'RE ALMOST DONE!"