Lexie Carver was desperate to have a baby, so her evil father Stefano Dimera arranged for Lexie to adopt the baby of drunken tramp Marlo, who "disappeared" shortly after the birth of her son. On the same day that Marlo gave birth to a baby boy, Hope Brady and her husband Bo Brady happily welcomed a baby boy to the world. Lexie and her husband, Abe, and Bo and Hope couldn't have been more thrilled with the new additions to their families! Because Hope was brainwashed by Stefano to be "Princess Gina" when she became pregnant, Stefano believed that he could be the father of her baby. In order to keep "his" baby in the family fold, he arranged to have Marlo's baby and Hope's baby switched! But a DNA test showed that Stefano wasn't really the father.

John Black discovered that while brainwashed, he fathered Hope's baby--a revelation that rocked John and Marlena's marriage. Hope learned that John is the father, and she made a pact with John and Marlena to keep the secret from Bo. When Glen, the biological father of Marlo's baby, and his wife, Barb, came to town, Lexie wound up discovering the truth-her son, Isaac, is really Hope's son and Hope's son, JT, is really Marlo's son. Barb found out the truth, as well. As Barb blackmailed Lexie with the knowledge of the baby switch, Lexie became more and more desperate to hold onto her beloved son and keep the baby switch a secret.

With the help of Rolf, one of Stefano's henchmen, Lexie launched a diabolical plan. In order to distract Hope from finding out the truth and to keep the child she's raised since birth, Lexie planned to plant Gina's memories (which include Gina's love for John) into Hope's mind! At the "Mother of the Year" party which Lexie threw for Hope, Lexie arranged to activate the chip in Hope's mind so she would once again become Princess Gina. At the party, Hope realized something was wrong and turned to John for help. As John removed the chip from Hope's brain, Hope was overcome with Gina's memories. As a result, she kissed John...just as Bo walked in!

In the aftermath, Bo finally learned that John is really JT's biological father. He was furious when he realized that Hope, John, and Marlena had all known the truth--and had been lying to him for months! However, Bo put his feelings of betrayal aside when he and Hope were forced to face a horrifying reality. The two learned that Glen and Barb had done a DNA test on JT.--and that Glen had proof that he was JT's biological father! Bo and Hope's marriage got back on track as they faced this crisis.

Just when it seemed as if the situation couldn't get more complicated, it did. John was determined to find out if Isaac was really his and Hope's son. Against Lexie's will, he took a sample from Isaac and had it tested. What he learned rocked both him and Marlena--Isaac was indeed the son of Hope, but not the son of John! John and Marlena feared Stefano was Isaac's father, but further research proved he wasn't. Bo and Hope were stunned by this new revelation. Bo and Hope faced the most devastating event of their lives when they lost custody of JT to the Reibers. As a result, Bo and Hope sued Abe and Lexie for custody of Isaac. Desperate to hold onto Isaac, Lexie kidnapped the boy but Bo and Hope were able to get him back. Bo and Hope gained custody of Isaac and were thrilled to find out that his biological father is actually Bo!