Ashley learns a new trick

You climb into the bed next to Ashley, turning her head to kiss her passionately, deeply appreciative of this fantasy come true. Your girlfriend's attentions turn to you as Heather slides away. Ashley smiles when your hand slides down her body, tickling between her breasts and trailing further down to tease her pubic mound. You can't help but smile as she wriggles on the bed to get closer to you and get your fingers into her wetness.

You smile and roll onto your back, letting your cock stand tall and proud, drawing her hungry eyes to it. She kisses you again and draws herself up, her hands warm on your body as they slide over your chest, down your abs, and onto your manhood. She teases your cock for a few moments, but gives into her own horniness and mounts you, dropping herself fully onto your length and sighing happily at the feel of her filled pussy.

Over her shoulder, you see movement. Heather comes up behind Ashley, a wry grin splitting her sexy face. You say nothing as you rock your hips into Ashley's, eliciting soft moans that gradually increase in volume and desire. She leans down into you, crushing her tits into your chest as her tongue finds its way into your mouth again.

Ashley's lips move from yours, nibbling on your ear as you fuck her with strong, deep thrusts. Heather re-appears in your view, smiling and shaking the tube of lube playfully. You look down Ashley's back and realize what's about to happen only a split second before the moment of truth.

Ashley suddenly screams in pleasure-pain as Heather pushes into her ass with a black strap-on. You can feel it slide along the underside of your cock through the thin layers of Ashley's insides. After only a few moments of moaning, her eyes open to look into yours. Her eyes are accusatory only for a moment before she realizes it's not your cock inside her nor did you know what was going to happen.

"You said it was as big as him, Sis," Heather says in an oh-so-sexy voice. You realize Heather's eyes are locked on yours even as her hands knead her sister's tits. "That's what I was feeling just a couple minutes ago." Heather winks at you.

Both of you start to move, drawing shrieks of pleasure from Ashley. You feel her pussy spasm in orgasm twice before your balls start to twitch. You groan loudly and happily as a massive load of cum erupts from your cock and spews deep inside your girlfriend. Your entire body shudders from the **** of it; Heather holds her sister down on your cock and her own toy in her sister's ass.

You breathe heavily as your orgasm fades. Your cock finally softens and slips from Ashley's drooling slit. You barely have the strength to get out from under her to witness her filled ass for yourself. Heather takes her time taking the strap-on out, bringing a satisfied moan from Ashley.

"God, why haven't we ever done that before?" she sighs as she collapses face-first onto the bed, leaving her ass sticking out. You smile at Heather and kiss Ashley's asscheek in promise of a good ass-fuck in the future.