According to her, Milagros would be put more in danger if Celeste knew that she was with somebody.
Is this correct? Thanks!
Yes, that is correct.
I'd prefer: 'M would be put/placed in greater danger if ...', but that's just a personal thought.
I'm not sure it is no more than a personal thought. The thing that is increasing is the danger rather than the putting; 'put more in danger' is at best inelegant, but I'm uncertain about whether it's worse
b