Tease her with some dirty talk.

You contemplate her for a while, and then finally, ask softly: "So - are you getting wet now?"

She stares at you with big eyes and squeaks in protest, folding her arms in a reflex as if to protect herself. You chuckle.

"That's what you said, no? That's what this is all about? You do this, because it turns you on. You do it alone, to fantasize about being helpless, reduced and out of control. Now how does it feel to have me staring at you, gagged as you are?"

She says something, but there's only an "Agh-ag!" sound coming from her mouth.

"Is that a yes?," you say, grinning, to her. "Is you pussy moistening up, with me being here in the room?"

She blushes and shakes her head, making another "Ho-gha!" sound, which could mean anything.

"Tell me, has it ocurred to you that all this wasn't exactly a smart idea, because... if, say, I can't keep my hands at my side and decide to slide them into your pants to check if your snatch is as wet as I assume it is - you can't even shout for help, right?"

She goes rigid, apparently frightened, but your eyes also pick up how a ripple of shivers rushes through her body. Her cheeks have turned into a dark shade of red.

"That turns you on, right?," you whisper. "The thrill of not being able to protest properly."

"Owhg-go!"

"Was that a Yes?," you ask.

She shakes her head again. You grin and chuckle again. "Oh, I think that was a Yes, my little gag face."

A shiny drop of drool leaks from her mouth. You flash her a big smile. "Look who can't control her body fluids! If you're drooling like that, your pussy must be dripping as well."

She tries to control her spittle, but doing so just makes matters worth. Soon, a strand of drool drops down from her chin on her clothes. She whimpers. The whole scene is more than arousing. You can feel your cock pulsating and hurting inside your pants.

"You know what?," you tell her. "This is hot for me as well. My cock is getting rock hard just looking at you."

Her eyes go wide again, and you catch her how she stares at your crotch for a moment. You also notice that she could, of course, reach for her head anytime to remove the gag. It would take a while, and there's still your threat of **** over her head, but it's somewhat telling that she keeps her hands by her side.

"Wanna see?", you grin.

"Ogh-gha!," is the answer.