Excitement spreads faster than Peter can stop it because she knew! She knew where the name came from! Other than Mr Stark, who criticized his naming choices, she was the first one!

"Yup. Sure did. She likes the name, don't you Shelob?" Peter asks her.

"Spina!" Shelob responds with a happy nod before holding out one of her front lets in a way that's vaguely like handshake.