He cannot

Tia: -I think you should leave the Ring behind, Bob. Is that so hard?

-Are you trying to take my precious?

-There's no need to raise your voice, Bob.

-Well if I did, it's your fault! It's mine...

-I think you've had that ring quite long enough.

-What business is it of yours what I do with my own things! I knew it... You want it for yourself!"

Tia: "Bob..."

Suddenly Bob raised his head and jumped into Tia. The witch reacted a moment late because she was shocked by what she saw: The eyes of Bob turned to gold color, while his pupils were slitted.

When she's back to her senses, Bob already pinned her down and sat on her body. His right hand still held the ring, while his left hand grabbed her throat with a **** that should not come from an old man in his nineties.

-Well, well, well. I knew your secret, witch. Stop you from speaking and your magic is no more. Now you're just a defenseless woman...

Then the tone of his voice changed

-Yeah... you are a woman...