She rides you...and explains.

"A little bit of this, a little bit of that." Selas says, walking out of her clothes. "First, I made sure that you will always cum enough to fill any woman up completely." She pats her flat, toned stomach and beams at you. "A very fun test run too. It took me three days to completely absorb all of your essence."

Your cock immediately hardens and tents the sheets when she straddles you. "Second, you can't cum unless you're in a woman. Mouth, ass, pussy, doesn't matter. As long as you're not in her, you will never cum. Well...maybe if she's into being covered in cum, but what woman doesn't want a nice hot load inside her?"

"And third..." she lowers herself onto your cock. Your whole body twitches as you feel her hot wetness on your bare cock, even though you know there's a sheet between you. You moan loudly, as pleasure runs through you. Selas starts rocking her hips back and forth. "Mm..." she purrs, adopting a stereotypical cowgirl accent, "you can only feel sexual pleasure with me. Other girls'll make you cum, but only I'll make you enjoy it."

You look at her angrily and try to suppress another moan, but she's right. Mei's blowjob made you feel nothing while Selas' pussy feels like she's making every cell in your body explode with delight. "What do you want with me?" You hiss, fighting against the pleasure.

"I told you," Selas pants, picking up speed and taking off her cowboy hat that came out of thin air, "we're going to have fun together. You, me, and every mortal we can fuck. Now hold on to something, cause this cowgirl's gonna break this stallion."

She makes you cum inside her twice before finally letting you sleep.