Zoe felt uncomfortable and then got mad when she found out that Denise was trying to do a DNA test on her without telling her. Angry, Zoe went into the room where Denise was staying and asked for an explanation. Surprised, Denise admitted she had doubts about Leo's blonde hair, which didn't match anyone else in the family. Motivated by curiosity and uncertainty, she decided to confirm Leo's biological father. Zoe was surprised and upset because she couldn't believe that Denise would do something like that. She told Denise to go so she could think about what happened and help her upset son.
In the following days, Zoe and Andrew's relationship became more strained. Denise had already spoken to Andrew, making him doubt things. Even though he was unsure at first, Andrew proposed that they take the DNA test to finally resolve the issue. Zoe agreed, but only if Andrew also did a DNA test to confirm he is the father. If Denise questioned Leo, she should be ready to be questioned too.
Andrew was surprised by Zoe's request, but he ended up saying yes. A few days later, the test results came in and showed that Leo was really Andrew's son. However, there was a surprising turn of events—Andrew's test showed that his real father was not the person he had always thought he was. Andrew had a hard time understanding the surprising news. Zoe started to keep her distance from Denise because she was not ready to forgive her mother-in-law's actions quickly.
In the end, Andrew talked to Denise, who confessed to having cheated when she was young. This discovery changed the way Andrew saw his family. He chose to spend time apart from his mother to concentrate on his family with Zoe and Leo. Denise had been feeling guilty for a long time, and this guilt made her see her own insecurities in Zoe and Leo. Now, Zoe and Andrew were committed to moving on, concentrating on their son and putting Denise's problems in the past.