The dark secrets are finally coming out in Ang Mutya ng Section E Book 2: The Dark Side, and the latest episode 4 just revealed how Keifer lost his mother. In Season 1, he tells Jay that his mother died and his father remarried.So, he kicked them out of the house and raised his brothers on his own. However, Keifer didn't explain how Serena died until episode 4 of Season 2. When Kaizer Watson returns, he forces Keifer to sign inheritcan documents if he wants Keiran to stay with them.Initially, Keifer refused, but when Jay was put at gunpoint by Dylan, he agreed to sign. And just when he was about to lose the money his mother gave him, Jay challenges Dylan. Her bravery forces Kaizer and his hitman to back off.However, it did leave Keifer in shock as he thought he might lose Jay-Jay just like he lost his mother. Later in the episode, Keifer reveals that Kaizer killed Serena in front of him, and he couldn't do anything.This is the worst memory, and it got triggered when Jay put her life on risk for him. Serena also did the same and was brutally killed. So, Keifer asked Jay to never pull anything ike this again.Ang Mutya ng Section E Book 2: The Dark Side: How Keifer lost his mother, explained View this post on Instagram Instagram PostAng Mutya ng Section E Book 2: The Dark Side is finally revealing the past of the main trio, and this time, the focus shifts to Keifer. As seen in episode 4, Keifer tells Jay-Jay that Kaizer wasn't just an abusive father, but an abusive husband too.He used to beat him up, and when Serena intervened, Kaizer hit her too. She finally left him and moved out with Keifer. But when Keiran was born, Serena ended up forgiving Kaize,r and he returned into their lives.One day, tension escalated between Keifer and his father as Keifer stood up for his mother. However, Kaizer beat him up and brutally killed Serena by hitting her head multiple times on the wall.The moment was extremely brutal and heartbreaking for Keifer as he saw his mother's dead body beside him. Since then, he decided not to risk the lives of the people he loves.And when Jay challenges Dylan, Keifer was scared to lose her. This is why he yelled at her first and then requested her to be safe. Kaizer even knows a lot about Jay's parents and almost everyone close to his eldest son.Also Read: Ang Mutya ng Section E Book 2: The Dark Side Part 1 release schedule: When do new episodes of this Filipino series drop?Why has Kaizer Watson returned in Ang Mutya ng Section E Book 2: The Dark Side?Keifer and his father (Image via VivaOne)Kaizer Watson has returned in Ang Mutya ng Section E Book 2: The Dark Side because he wants to take away the money that Serena left for her sons. Kaizer accused her of stealing the money from the company, but it always belonged to Serena.Kaizer knows how much Keifer loves his brothers, so this time he plans to take away Keiran from him if Keifer refuses to sign the documents and transfer the money. While he stepped back in episode 4, it doesn't mean Kaizer won't harm anyone anymore.So, fans should expect more chaos and drama in the upcoming episode.Also Read: Ang Mutya ng Section E: Keifer vs. Yuri – Which one truly deserves Jay-Jay's heart?Continue exploring SoapCentral for regular updates on TV shows.