"How many other times did you think you were being careful?" Percy asked sarcastically. He didn't know why he was surprised. With the amount of lovers Cass had had, mistakes were inevitable. In fact, it was shocking that there was only one mistakes... unless there were more and Cass had avoided dealing with them.
"Whether she lied or not doesn't seem relevant when the child is six years old. Try focusing on the fact that she obviously doesn't want him and he needs a parent. Maybe you should find out why the sudden confession. It seems unlikely that someone keeps a secret this long, and suddenly decides to give you the chance to spend time with him," Percy pointed out. "Again, regardless of all that, he still needs a parent. Are you going to abandon him because it doesn't fit your plans?" Maybe Cass should have a talk with his own father; they'd get along just fine.