Enjoy the warm, sunny day

"Let's go fuck in the back yard," she suggests as she leaves her bedroom. You barely hear it, and you're certain Heather couldn't have.

"What about your folks?" You don't have any issues with going anywhere she's going, but you also want to continue your relationship with her.

"Gary's on a business trip, and Mom took some vacation time to go with him. They won't be back for a week at the earliest." She leads the way outside, not even looking back at you; your cock acts almost like a magnet, aiming for Ashley.

The day is warm with a gentle, comfortable breeze. The few clouds above are thin and do little to hide the sun. The high privacy fence and thick trees shield the two of you from peeping toms. Ashley heads toward a large hammock that sways gently in the soft breeze.

"So, I guess I need to ask: Does it bother you that your girlfriend is a bi slut?" Her question is blunt and to the point, one of the qualities you've come to appreciate and respect about her.

"I can't think of a guy alive who would have a problem with a bi girlfriend. And I don't think you've had enough partners to qualify as a slut." Your hands rest on her ass; you nibble on her ear after answering the question.

"So ten partners doesn't qualify me as a slut? How many does it take?" Her lips brush against your shoulder as her arms cross your upper back.

"Doesn't matter. I wouldn't think you were a slut if you had a hundred partners. A slut's just a girl with a pussy you can park a bus in. I still think I'm going to tear you in two every time we have sex."

She surprises you with a swift change of leverage and throws you onto the hammock. Working while you're still stunned, she tangles your wrists into the ropes, then tangles one of your ankles into the other end.

"That wasn't the right answer." She climbs aboard, moving her body expertly with the sway of the hammock. Her pussy is bare centimeters from your balls. "I want to be a slut. I want to be your slut. Just like I want Heather to be our slut."

She digs her fingers lightly into your hips, drawing them closer to your pole. "But since you don't think I can be a slut, that makes me think you don't want a slutty girlfriend. So you'll get a bitchier one." You want to move, you want to grab her and wrestle tongues with her while your cock plugs her leaking slit. But in your position, you can't do much.

She grabs your cock in a tight fist and strokes it roughly. You grunt in response. She looks down on you as she toys with a nipple, then slaps your cock.

"I know how fast you come when I use the handcuffs. You'd better not come first out here, or I'll leave you just like you are right now until Mom and Gary come home." You can swear you hear Heather's orgasmic screaming. "And I'd rather have you and Heather to play with for as long as possible."

She moves off the hammock, then climbs back on with her ass over your head. "So you know what I want, and I'll give you what you want after."

Your tongue happily goes to work on her pussy, feathering over her clit and labia before lapping up her dripping juices and slipping inside her fuckhole. From this angle, you have an opportunity for something you've never tried before. Your tongue draws a line from her clit across her pussy and begins to tickle the sensitive skin between her twat and ass, getting a sharp moan of approval from her, followed by a welcome kiss to the head of your manhood. Your tongue moves further up, touching her rosebud; Ashley makes a surprised sound and pushes her ass closer to your lips. Your tongue penetrates a short distance into her sphincter.

"So first you get Heather to assfuck me, now you're licking my asshole? You've got some sick fetish there, sweetie." The tone of her voice tells you she's enjoying it more than her description would say. She sucks gently on your rod, then lets it go. "But this isn't getting me off."

You smile and return your attention to her pussy, letting her moans and sighs and movements lead you to where she wants to go. Your tongue drips with her juices as it strokes her clit and dives between her lower lips. She shudders and moans as her pussy gets wetter and wetter. Her breathing gets heavier for a few moments before she achieves climax, soaking your chin and lips. She grinds herself down onto your face, and you love it.

Ashley finally relaxes as her climax subsides. She climbs off you, glaring. Your cock is straining, in need of release.

"That wasn't good enough." She grabs your balls and squeezes just hard enough to make you yelp. "I need to come on a hard fucking cock. Think you can keep it up long enough?"

"Oh, yeah, baby. I wanna fuck your hot twat. I wanna fill you up with a hot load of cum." Your voice is pleading, both from your own desire and her hand currently crushing your nuts. She lets go, then climbs over you, steadying herself like an acrobat on a tightrope while she uses one hand to guide your cock into her. She teases the tip against her clit for a moment before sliding it home and impaling herself fully.