I was suspecting something like that might come about. Personally I hope for no Arthur, but I don't mind the implications that his presence suggests.
See this is where I'd actually enjoy the split perspective more, with Ian and Lena as adversaries of a kind
This is basically how I'd have enjoyed Jeremy to play out. Then if Lena comes on to him again he'd at least there's that context and Ian has had a chance to react.
There was nothing to suggest Seymour wanted to pimp out Lena though, this is a path invented by this forum