What Happened To Theresa On Days Of Our Lives?
After John fell into a coma, Brady was horrified to think that he had hurt his own father. Then, "Days of Our Lives" viewers watched as Brady ended his marriage with Theresa and focused all of his energy on John's recovery. Brady began attending AA meetings again, and it was eventually revealed that Kristen DiMera (then Eileen Davidson) had a formula that would save John (via Soap Central).
Despite their better judgment, John's family made a deal with Kristen. When Brady saw Kristen in Salem, he was furious, remembering how she'd hurt him in the past. So, he turned to Theresa for comfort. Theresa later found out that she was pregnant, but before she could tell Brady the news, he found out that she had been the one who had hit John over the head.
Of course, Brady didn't believe Theresa because of all of her previous lies. She offered to take a pregnancy test in front of Brady, but the results were negative. Theresa was confused about why she was no longer pregnant, but it was revealed that Kristen had stolen Theresa's embryo during her return to Salem and wiped her memory, per Soap Opera Spy. When Melanie Jonas eventually got suspicious of the situation, she began to investigate and eventually figured everything out.