The more times I see that panel, the more bizarre it strikes me that Hel would even ask that question. For one, that's not the kind of thing she even cares about in the first place, for two, it shows a weird and ill-fitting lack of trust in Babs, and for three, even if she were somehow worried about where Babs was getting her info, she wouldn't say it in front of Infinity and Misfit. Too strange.