"What if all these years the two had suspicions but didn't have the evidence? So, they continued to be filial and acting as if everything was fine, until we all got on Gloria's radar. Simon was bad to Gloria and committed atrocities against Xavier, turning him into the couple's enemy. But remember, Simon has a mother with a vile mind. If those two could stage such a large act and made everyone believe in numerous deaths, then the possibility of them investigating and getting the weakness of Wendy is very high.
Just look at the time Wendy got arrested? When she was trying to go for a retrial, she got arrested. With her in custody, she won't have any time to deal with her son's matters, and time will naturally pass. How could Simon have a chance to fight back when all his mind will be on his mother?
Without his mother's help, and William dead, Simon doesn't have any chance of winning anything. These moves cut off Simon's paths without him even knowing.
