"Things should take their course; she cared not how it ended. Her cousins might attack, but could hardly tease her. She was beyond their reach; and if at last obliged to yield—no matter—it was all misery now."

When Edmund came in her room Fanny had been wondering if she had done the right thing by refusing to act. Then Edmund comes in to ask her advice (actually to hear her agreement) and after he leaves these are her thought. Am I interpreting this correctly:

There will be a play now with Edmund acting in it, whether she likes it or not. Even if everyone is nasty to her because she won't be involved, she doesn't care about anything anymore since Edmund will act with Mary. And even if she is later persuaded to act, she'll do it but who cares. But I don't understand the sentence "Her cousins might attack, but could hardly tease her." What on earth is that supposed to mean?

Is Fanny so depressed nothing matters to her anymore? Is it that her heart is not just broken but shattered by Edmund? It seems awfully extreme, but then there have been a few posts about her extreme feelings - I don't remember seeing this example so I hope I didn't miss it in the previous thread.