... thankfully explained by Shapard's annotated Persuasion. "Henry and Emma" is a poem in which Henry, a jerk, tests Emma's love for him by saying that if she wishes to stay with him, she must face danger. He then tells her he loves another woman. Emma should have given him a SUTH. Wouldn't that also have convinced him that she loved him and felt betrayed?

I guess Wentworth wasn't told that Mary Musgrove's "jealous and ill-judging claims" were the reason for the switch. Charles should have told him that Mary demanded to stay at Lyme. However, since Wentworth heard Anne say that she was willing, ready, and happy to remain, why should she think that Wentworth thought that she was the cause of the switch. Anne is a bit paranoid. If I was Anne, I'd say that Mary demanded to stay at Lyme. Would that break some kind of social taboo?