Some of what you're doing there reminds me a little of what Tolkien himself did with Shelob.

Yay! That's high praise, Himring! Thank you!

I guess some of the things Gandalf says about creatures like her quite lend themselves to a Lovecraftian interpretation, don't they?

Oh, yes, and I'm far from the only Tolkien fan to think so. As noted to mews1945 above, maybe it's some of Lord Dunsany's influence on Tolkien creeping in there. Dunsany's work also influenced Lovecraft.