So i must play the game from the begin? Or there is some Cheat?
Actually, in Penny's notes it's explicitly written that the MCS-X is extremely experimental, and apparently, every behavioral change is permanent. So it's up to the player if they want to fuck up their family with MCS-X (It's not an obligation to use that serum, so you can avoid its consequences). There's no right option after using MCS-X, whatever you order them to do or become, they will, without any complaint. So, unless you were a complete paranoid like me, and had several saves before specific important decisions, and events, then you should start from the beginning. However, since there's no chapter 3 yet, you must have seen most of what the game has to offer.