tip: lex m/m (mature OR explicit)
Again its a struggle for him. He's scared and has a conflicting sense of duty and maternal instincts.
But he doesn't need to have that struggle. That is what he needs to figure out.
There's a lot of self-doubts he's feeling. This was something he faced before the serum that he never came to terms with. Even then he couldn't tell his best friend. In the second chapter he comes close but events happen that get in the way.