cmiiw since its been a minute since i read the novel
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but im pretty sure he finds out quite late, he bascially tells Josh that he wants to meet his kid and rents out an amusement park some stuff happens and they kinda end up in a situation where pete gets lost and somehow ends up close to an aggressive dog. Chase finds him first but his fear of dogs kinda has him paralysed but I think he kinda overcomes him and saves him and I tgt after that Josh tells him thats his kid?
( again rllly sorry if i am misremembering this but i tht it was around that time)
Tell me please
Some one please spoil it how many chapter till chase get to know about pete