Seretti's pretty simple in some respects: she works hard, so she expects other people to work hard, and if everyone works hard and smart then she's happy and Arty sounds like he is the kind of person who working with him makes Seretti happy.  More to the sexy side of things, I'm not sure how strictly compatible their hinks are -- she's way more intellectually comfortable with being gooshy-sweet positive reinforcement than she is with being rough with people who don't 'deserve' it, even if they are actually interested in that variety of interaction...<br/><br/>Might just be a case of not-quite-compatible interests, ultimately.