[You know, he figured you might be needing some company today. Which is why Stiles is searching him out, during the day and before Porthos takes any chances with trying to shoot the new Kiseki inhabitants. He just falls into step with Porthos effortlessly, not even saying anything for a while - he's seen Aramis, obviously, and that means he's seen the baby, and well, with all he knows... it's not too hard to get what that would mean for Porthos.
Which is why it's not hard to get why he might be in need of someone to talk to, someone who actually knows what is going on.]
So... you wanna talk, or should I just go get the nearest bottle of wine?