(putting this here, so as to not derail the thread)
When the party returns to The Blacksmith's, they likely find him and Fiona sitting on a couch talking. They had a nice long talk about many things – the nature of magic, the nature of Magic, about whether Fiona would come to Magic for the occasional booty call, etc. She very much likes to have her field plowed by him (in fact, it took all her self-control not to drag him back to the bedroom while everyone was gone), but the time-flow differential makes that problematic; one night in Magic is three or four days in the Mortal Realm, and that would seriously detract from her work. And it wouldn't be fair to him to just be a plaything to satisfy Fiona's desires. She does suggest that he come visit her if/when he's able if he wants to spend time with her, don't know if that's possible or if something he'd be willing to do.
But she's ready to go when they return, she asks how it went, whether they were able to locate/retrieve Marcus, etc. And, since they know how to get back if they need to, she doesn't feel the need to offer to be their guide or come with them next time.