“Oh, it's quite a story. Lol,” Teigen wrote on Twitter in response to a fan who said they were “confused” about the timeline.
“I did the routine pregnancy test you do before surgery. It said negative. It was not negative,” the soon-to-be mother of three explained. “A few weeks after surgery, I took a test. And for many years now, I've taken pregnancy tests almost every month, praying to see a positive one day. Just wishful thinking. I never had a positive before.”
On June 19, the day her husband released his latest album, Bigger Love, Teigen took a pregnancy test — which turned out to be positive.
“I was scared,” she wrote. “Was pretty positive you shouldn't get your boobs out while pregnant? Pretty sure.”
Multiple sources confirmed to PEOPLE on Thursday that Teigen is expecting after the couple hinted at the pregnancy in Legend's latest music video, "Wild."
At the end of the romantic video, which also features the parents enjoying family time with Luna and Miles on the beach, they stand together in front of the waves as Teigen puts her hands on her stomach, revealing a tiny baby bump.
Hours later, Teigen showed off her growing baby bump on her Instagram Stories and Twitter.
"Look at this third baby s—," Teigen says in the video, posing in front of the mirror in a pair of black leggings and an open blazer. "What the ... oh my God."
During a live chat on YouTube ahead of the video's premiere, the couple also spoke about how special it is to be able to watch their relationship evolve throughout the course of Legend's music videos — which began with “Stereo,” where they first met on set.
“We have 'All of Me,' the marriage, no kids yet. 'Love Me Now' with Luna and this one with Miles,” Teigen explained, as Legend added, "It's been chronicling our family's growth and our journey and we're so happy that this video is the next chapter."