Probably not the case with her, but I'm registered as a Republican to vote in their primaries. The way the party has gone though it's going to be a cold day in hell before I vote for a Republican in a general election.
There's a lot I disagree with Democrats on, but in general I can usually live with whoever they end up putting up as a candidate. I may not be thrilled about some of them, but they're usually not trying to send us headfirst into a fascist hellhole.
Republicans though, while pretty much all shitty, are a bit of a mixed bag, and I'd rather try to head off the trumps, Santoses, DeSantises, etc. before they make it to the general election.