Interesting passage! I have no familiarity with this fandom, but even without it, I can very much appreciate the drama here -- and the possible future comic ramifications. As for your question, it seems to me like she is definitely cursing at the situation, rather than the new partner.

If you don't get an offer for a beta as you have requested, my suggestion would be to repost your need as a new post in the community, just in case it gets lost in the shuffle here.