On a 10+, fuck her ass, she likes it, she cums.

Karen Yoshida steps up to the massage table by the wall, bending over to stick her butt out for you. A thick, ball-headed vibrator sits ready at hand. You kneel behind Karen's muscular butt cheeks and lube up your cock and her tight little rosebud. Her pussy looks swollen after riding you.

The throbbing of the fresh bruise on your chest and the sharp definition of Karen's leg muscles remind you that you want to take extra care to make it good for her, since she has just demonstrated that as hot as she is for you and your big cock, she can and will take you apart kick by kick. You breathe slowly and deeply, concentrating on the lube job. But no fear or hesitation will make your cock go down. You're proud of always being up for the job.

"Oooh," Karen sighs as you slip a finger up her ass. "Oooh, yeah, get me ready." She laughs. "Time to spend that ball juice you've been saving up."

You get a tingle inside at how much Karen wants your cock in her ass. She told you she was a real butt slut. You wonder how she got to like it. It took ages for you to convince Sharon to play with her ass, and she'd only do it in the shower.

"That feels good. A little faster," Karen says. You keep diddling her tight, hot butthole with a lubricated finger.

"Karen?" you say. "Did you always like playing with your butt, or did you pick it up later on?"

"My big sister had a boyfriend and I was always pestering her to tell me what they did together, especially sex," Karen says. "Mimi told me how much she liked it when her boyfriend played with her butt. He started her on it, and he got into it from his first girlfriend. Mimi liked it a lot. I think extra much because she knew Mom would think it was dirty. So when I got started with guys, I really wanted to try it too." She sighs. "Try another finger. Yes. There. You know what you're doing. How did you get into it?"

With a second slippery finger inside, Karen is loosening up for you.

"I was helping out with a wedding. The matron of honor picked me up. She asked for me to put it in her ass," you say.

Karen laughs. Her butthole squeezes down on your fingers. "A wedding? Was she drunk?"

"Ice cold sober," you say. "With malice aforethought."

Karen laughs again.

It had felt like the Angel of Sex had sent you a personal gift. The gold ring on her finger meant she was someone else's responsibility, that this was just about now. You and she were both eager, but you had been more than a little awkward.

You take a breath, slowly moving your fingers in and out of Karen's butthole, and continue. "I didn't know what I was doing. I guess she was so hot on making it happen that she talked me all the way through. Well, until we were past words."

"Ahhh," Karen sighs. "Want to give it a try now?"

The bruise on your chest throbs with your heartbeat. So does your cock, slick with lube.

"You're the boss," you say again. You slowly remove your fingers. Before you rise, you kiss her on each butt cheek, firm and tight under your lips. You stand up behind her, grab your slippery shaft, and feel for your target with the tip of your cock.

"A little higher, a little higher...right there. Stay right there," Karen says.

You feel something moving at the tip of your cock, a little pulse. She presses her butt back at you, there's a little 'Spsst!' and her butthole swallows your cock.

"Oh!" Karen says.

You try and press back, but she waves you off with a hand.

"Stop, stop. Don't move." Her breaths are fast and uneven. "What did I get myself onto?"

You stand still, your lube-smeared hands cupping her tight buttocks, while Karen lays her head on the padded table and breathes deeply, trying to relax. Her ring eases from tight to snug as she breathes in and out.

"Okay, don't move," Karen says. "Just let me move to start."

You're the boss.

You hold yourself steady, using one hand to keep your cock angled straight as Karen starts fucking her ass back on you, at first with tiny little motions, then deeper, an inch at a time, two inches. So hot, so snug inside her, so sure yourself that she wants this, she wants you up her butt. She starts sighing each time she presses back at you, a soft, rhythmic little "Ah, ah, ah, ah, ah."

Karen pauses her motions. "Okay," she says, "Go. Slow. Short, not too deep." She reaches for her vibrator and holds it ready between her legs.

You follow Karen's directions, starting with slow little thrusts. Three, you think to yourself. You've had your cock up three women's asses. Glenda, matron of honor, married, mom, midwife, anal angel. Sharon, girlfriend, golfer, good girl, giving you her butthole reluctantly. Karen Yoshida, bottomless kickboxer, flattening you, then begging for your cock in her ass. Right now.

"Ohhh, that's good, Joe," Karen says. "Just like that, keep going like that."

"Yeah?" you say. A warm, tingly feeling is starting to spread from the head of your cock toward the base of your spine. You keep thrusting slowly and evenly, but you keep feeling that tingle.

"Ah, ah, ah, ah, ah," Karen pants along with your rhythm as you thrust into her ass.

You look up and away at the corner of the ceiling, trying not to look at the hot, tight ass of the strong, sexy woman you're fucking. "Ms. Yoshida," you say, slipping back to how you'd call a pool-cleaning customer. "Ms. Yoshida, I can't keep going, I'm gonna come in your ass."

"Yes!" Karen says. "Yes, do it!" She clicks a switch with her thumb, and her vibrator starts whirring.

You try your best, just to hold that rhythm, short steady thrusts, hearing her sharp little moan each time you thrust, feeling that tingle spread up your back and down your legs, Karen's vibrator buzzing through her taut flesh to tickle the head of your cock, her buttocks so strong and tight under your hands.

Karen screams out loud as she catches her orgasm, her black ponytail whipping up and down as her head tosses. The muscles in her back and neck stand out as her body spasms with pleasure. Her butthole squeezes down on your cock, triggering your own blast, and you raise your voice along with hers.

Your final thrusts pound into Karen's butt as you come right with her, right after her, both of you crying out your release.

Mark +1 XP (=2 total) for making Karen cum.

Karen clicks off her vibrator, drops it on the floor, and lays her upper body limply atop the padded massage table. When she tells you, you ease your softening cock out of her ass, trailing a thick white lace of seed. As before, you collapse together to the athletic mats, cuddling Karen as you lie on your sides.

"God, my ass feels so full still," Karen murmurs. "And so wet. How much did you put into me?"

"That was a big one," you say. "I was saving it up for the right occasion."

"Joe, I'm sorry I hurt you," Karen says. "It scared me when you weren't breathing. Thank you for staying with me. You made me feel so good."

Your chest is throbbing dully, but it doesn't hurt to breathe, so you're pretty sure she didn't break a rib. Though you'll want to wear a shirt when you're on lifeguard duty to hide the bruise.

"It was wonderful," you say. "I'm sure I'll be okay."

You lie there, cuddling her gently.