Tie them up

The conditions of the victory said the victor gets to do whatever they want with the loser. That includes tying them up. While coming in you spotted several jumping ropes. Before that, however, you also remove Stacy's clothing. It's been sometime since you fucked that hot body of hers, and you can't wait to do it again. The gym is fortunately not popular and is empty right now, so no one should interrupt your quality time with your ex and her hot friend.

Quickly grabbing the ropes, you first tied up Alex, who you feel is the bigger menace. She tries to fight back from the floor, but her fixation with not letting you see her naked as well as she being on the floor gives you the upper hand. You tie up her hands and legs, guaranteeing she won't be getting up. You look over at Stacy, who is up again, but looks dizzy and disorientated. It's not hard to tackle her again. Once she is on the floor, you also tie her up.

After this, you decide to let the girls there for a while to catch their breaths while you go get something to drink. The knots are expertly tied, so there is no way they will get free.

When you come back to the gym, you find the two girls are actively trying and failing to untie your knots. You approach them, smiling. They turn to look at you.

"You fucking cheat, let us go now!", shouts Stacy, who is clearly angry about the situation. You simply smile at her.

"Yeah, that was not fair, I'm stronger than you, I won that. Let us go now", responds an equally angry Alex, who is turned away so you can't see her naked. You walk over to her.

"Well, you see girls, I won, there's no denying that, you both are tied up on the ground, unable to free yourselves. How I won doesn’t really matter, the fight was meant between us, right Stacy? You cheated too. And the rules said "the winner gets to do anything they want to do with the loser", that's what I have done here. Now, for what will happen next. You may not know it, but this gym's owner is an old friend of mine. I got him to close it for the rest of the day on an old debt. Which means I have the rest of the day to play around with you", you tell them calmly as their eyes widen.

"Don't worry, girls, I won't do anything much, just fuck you both silly", you happily say as you strip of your own clothes.

"You wouldn't dare", says Alex in a defiant voice. But in that voice you also hear desperation.

"Not so strong when you don't have the upper hand, eh girl? Then I guess I'll start with you. No offence Stacy, but your friend is hotter than you, and I've fucked you before", you say as you walk over to Alex and turn her around, forcing her to show you her naked body. You smile as you finally take in her naked body. She is incredibly hot. You have to thank Stacy for bringing her along. Fucking Stacy alone would have been great, but it wouldn't have compared to this.

You hold your dick in front of her. She tries to avert the eyes from it, but finds herself drawn to it. You laugh at that.

"Can't keep your eyes from it, eh? You want me to push it inside of you? I didn't know you were a slut, Alex", you mock her as she blushes and looks elsewhere. She isn't anywhere near as strong and mighty when she is tied up with a dick in front of her. Now, with which of her holes to start with?