I was glad it wasn't the brainlessness thing, certainly. And that first panel is very nice.
The thing is, while we might assume that this is a bit of harmless fun, it's effectively the same thing that Miriam has just done to Erin and Raven. And Hayley and Miriam have a similar status within the harem. The difference is probably that we know that Hayley has a bit of a thing for Laura. But on the other hand that gives her an actual, personal motivation for what she's doing. And that may be why I find it quite hot.
The framing of it definitely presents what Miriam is doing as more sinister, to be honest.