Fuck her

Needless to say, this is a strange situation. A woman you don't even know is encouraging to have sex with you defenseless, tied up girlfriend. Even if you were to believe the other things she's saying, It doesn't seem right. However, with everything going on you find yourself extremally horny. Your cock pushes through your pants, attempting to make the decision for you.

"So this is all just a kinky game, right?" You ask. You know what you want to do, but you also want to feel better about it.

"If that's what you want to call it." Mistress Erica says, now slowly sliding her finger down towards Olivia's slit, "But the thing about a good game is, you never want to stop playing." She quickly shoves two of her fingers in, receiving an instant, muffled moan from Olivia.

Just the sight of all of this is enough for you to make your decision. You begin frantically removing your cloths as Mistress Erica begins to pump her fingers in and out. You toss each clothing article onto the floor until your are completely naked.

"Well, it looks like you've chosen." Mistress Erica says with a smile.

You walk up towards her but quickly bring your attention to Olivia. You watch her ass shake from side to side as Erica's fingers move inside of her.

"She's wet and ready." Mistress Erica says as she slowly removes her fingers. She brings them up to your face and gently swipes them against your lips. For some reason, you instinctively stick your tongue out, licking them. "You already know to appreciate the taste of your mistress." She says, seeming genuinely pleased. "You almost make me want to keep you for myself." Through your lightly parted lips she slides her fingers into you mouth. It's surprising, but not off-putting, as Olivia's juices rest on your tongue. She soon slides them back out, seemingly pleased with your reaction before stepping back, giving you full access to Olivia.

With one more look at her exposed and waiting lower half, you take a deep breath before lining up and plunging in. You feel a welcoming warmth surround your cock as you slide into her. You hear the accepting grunts from her front half as you begin to thrust. You start out slowly, enjoying every movement, pulling back before pushing in deep. You continue at this pace, enjoying yourself, when you feel a hand on your shoulder.

"You know, I don't normally get to see a sub fucking their mistress." Mistress Erica says, while placing her hand on your other shoulder as well. "I must say, it's an invigorating sight." She slowly begins massaging your shoulders as you continue your thrusting. "I planned on just being a spectator." She says. "But maybe this situation demands more."