He will change, that's the character arc.I was kind of on the fence about MC being aged up. It just seemed like a bit of a cop out though it would make everything easier, but to bring back Mom... gotta save Mom. Though it is irritating with sex dolls treating him like a son/grandson/baby all the time. The only one who should have that excuse is Aisha, and that's because she's an uptight bitch.
Implausible / unbelievableIn my imagination, I was thinking they would find another ship with her in cryo, maybe a little older, with a new sister for MC. The sister could be a half-sister Mom had with a new man after she got over MC disappearing, or a full sister she accidentally has with MC's dad while grieving the loss of their son.