A pleasant surprise.

She slides her pussy off your cock, shifts her hips forward and sinks back down. You don't look, but it feels different. Tighter, though a second ago you didn't think it possible. Not as wet, but still well-lubricated. Is it...?

You look down. Your suspicions are confirmed. You are now ass-fucking Rin. And she absolutely loves it. She buries her face in your shoulder and scream out loud in ecstasy. You can't take it anymore. As you grab her tits hard and pound her tight ass a couple more times, you blast her guts with cum. It feels like gallons to both of you as you flood her. Once she feels you shoot, she screams into your shoulder again as she cums too. When you both finally stop cumming, she slides hesitantly off your semi-hard pole, panting. You almost faint. She puts her robe back on, and you start to go but she stops you.

"Wait," she says with a wicked grin. "Wait right here. I have a special gift for you." She jumps onto a rooftop and vanishes into the night.