Asking About Umbrage

At the end of Order of the Phoenix, Hermione tricks Dolores Umbrage into the Forbidden Forest and the dubious mercy of the centaurs. It would be no surprise if Umbrage wanted revenge for that.

What I'm wondering, though, is what would her attitude to Snape be immediately after OOTP? During the book, she regarded him with favour, considering him an ally. But he wasn't an ally, he was just pretending to be. Would she have figured this out and want revenge on him too? Or would she still think positively towards him?