The source says that the GMA3: What You Need To Know co-anchors “are in love” and are okay with putting their budding romance out in the open.
“They spent the holidays together and are spending all of their time together right now. They are fully in a relationship. They are not hiding anything at all because they have no reason to,” the source explains.
The GMA3 co-anchors first sparked dating rumors in late November after photos surfaced of them holding hands in a car during a vacation in upstate New York and cozying up at a bar. Hours after the photos surfaced, Holmes, 45, and Robach, 49, shut down their respective Instagram accounts.
The pair have not publicly commented on their relationship, though they alluded to the news days later during a broadcast of GMA3: What You Need To Know earlier this month. Holmes and Robach were taken off air on Dec. 5 and remain on hiatus as ABC investigates their relationship.
According to public court records, Holmes and Fiebig filed for divorce after 12 years of marriage on Thursday. The source tells PEOPLE that Holmes “told some people he was unhappy in his marriage and had been for awhile” before filing for divorce.
The status of Robach’s marriage remains unclear, but a source previously told PEOPLE that she and Shue separated in August.
RELATED VIDEO: Amy Robach and T.J. Holmes Were ‘Dating in the Open’ After Separating from Spouses in August: Source
Never miss a story — sign up for PEOPLE’s free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.
The source said the two began dating only after they each split from their respective spouses. “This was two consenting adults who were each separated. They both broke up with their spouses in August within weeks of each other,” the insider said. “The relationship didn’t start until after that.”
Another insider told PEOPLE, “Amy was going through a heartache and TJ was very much there for her and helpful, and that is when they started something.”