>>712540850
My theory based on not finishing the game yet:
We know Fiona dies in the books and I'm not sure if she's dead in the game yet, but at some point when she's 'gone' (either dead or at Fall Fest, I can't tell) he realizes he can't be a single parent. This is part of why he makes the Mimic as a 'babysitter', but in Security Breach there's the family of Servobots that make me think there's something else going on. I'm not saying the Mimic is Fiona but it could have picked up on Edwin's desire for a family after her and David's passing and kept that as a 'core' trait hence why it reappears when its mimicking Afton in SB and creating the family of bots.