I have to reread to see if there is evidence by his INTERACTIONS with Emma that he should believe she suspects him. Even though in chapt 30 he starts to say that she must suspect something, WHAT makes him think she SHOULD suspect that he is in love with Jane and not her?

JA placed so many now obvious clues about Frank and Jane that everyone misses (except Mr K) as well as clues about Mr E's feelings for Emma that Emma misses (but Mr John Knightly doesn't) that I'm wondering if there are similar clues about Frank believing that Emma knows or should know.

For instance, if Frank by now already believes Emma suspects a relationship, how to interpret the Dixon scrabble scenario in chpt 41?: "(Mr Knighlty) saw that Emma had soon made (the word) out, and found it highly entertaining, though it was something which she judged it proper to appear to censure; for she said, "Nonsense! for shame!" He heard Frank Churchill next say, with a glance towards Jane, "I will give it to her -- shall I?" and as clearly heard Emma opposing it with eager laughing warmth. "No, no, you must not; you shall not, indeed."

Is Frank so far gone that he thinks this is somehow a shared 3-way joke between him, Emma and Jane? If so, how could he explain Jane's reaction to this scrabble? (Jane smiled at the "blunder"; she blushes deeply and refuses to play any more when she recognizes "Dixon" and turns her upset countenance away from Frank and Emma, though perhpas they couldn't see that she was upset).