Re: Question
Well, his initial concerns regarding Anne's well-being are more or less placated now because Anne herself has become more at ease with the idea of others knowing. His request to not be rude to her still stands, however, but that's not baby/adultery-specific.
As to how does Aramis feel? Well, Aramis doesn't really like Sherlock, so he obviously doesn't have a very high opinion about the whole deal, nor of Sherlock acting like claiming to know a highly important secret of his was nothing important and Aramis shouldn't even be bothered by it, as if Aramis could in any way trust him to keep it from others by default, or be comfortable with someone he doesn't get along with having this knowledge.
Right now, though, he cares a lot less because he has his baby and the fact that it is his baby is much more common knowledge, nevermind he's simply too happy to be irritated by someone he barely acknowledges anyway.
---
What's an important (or simply favorite of yours, if there isn't anything too huge) development of Sherlock's during his stay in the game, that you think he would not have accomplished in canon due to the differing circumstances?