You know a while ago I wondered whether there were any lesbian monster girl harems (though that was about books I think in manga I have seen one before though less ecchi. But for books I know monster girl harem and some rare lesbian harems exist but the combo I have never seen.)
Anyway the theory that she somehow is a succubus remains believable.
Also getting wrapped up by a naga's tail (not sure what their species name is here) is kinda hot.
It's probably really bad for slithering types in modern urban areas because of all non-organic trash and in suburban areas because of organic trash.
Imagine serpent-human after an hour walk on Manhattan. Or wichever crowded city is the closes to you.