I'm not trained in anything remotely PA related but post kids and economic necessity means I find myself in a PA type job. That's another story altogether!
My boss is much younger than me and generally I admire her, she is super bright and skilled at the technicalities of the role (scientific), she is fair and reasonable and we get on well.
Some of the documents I have to deal with contain the most basic errors, they're/there/their is a frequent one. Although we get on well I sense she would be offended if I say anything. I have no colleagues in similar roles to ask. Is it my job to make corrections when I haven't been asked? To clarify, my role is usually to collate/send rather than check.