[Perhaps before, she kept her distance after wishing Porthos a happy night, both because she didn't want to ruin it making the musketeers feel like they had to be proper with her around and her own uncertainty with these parties.
Now though, the thought of staying distant and afar from Porthos (and Aramis) doesn't settle well. It might be a little into the evening when she wanders her way in, dressed casually. She touches his shoulder when she greets him.]
... The evening already seems wonderfully lively. [Hellooo.]