Strap-on sex with Christina

"Go get changed," your father tells Christina. She seems to understand what he means, because she disappears into his bedroom without saying anything.

Your father approaches you. You lean down, showing him the top of your head and putting your rear into the air. He runs his fingers along your butt, linger on your asshole and then travelling down to your pussy. "My, my. Looks like my bitch does want to play after all. I guess that collar is doing its job well. Or maybe you're secretly more pleased to be a puppy than you'll admit."

He stands back and undoes the belt on trousers, tugging them and his underwear down. It's been years since you saw him naked. You never realized how ... nice ... his is. It'll fill you up but not stretch you too much. After yesterday's strictly girls-only session and with your newfound horniness, you're about ready to be stuffed.

"While we're waiting, I want you to show me what a good cocksucker you've become after a year at college." He leers at you.

After mom left, your father went through a string of girlfriends like he was trying on hats: each was wildly different from the last in looks and personality. Some had latched on to him because of the money. Others had probably loved him, for a time. Some had been stronger, more independent. Others had been needier and subservient. You have a sudden flashback to one of the latter--Michelle. You came home early from school one day when an after-school club had been cancelled. As you came up the stairs, you saw Michelle come out of your father's room--but she was nude, wearing a dog collar. You heard her call out, "I'll be right back with it, Master," before she ducked into the room next door.

You shudder as you recall what happened next. You waited at the bottom of the stairs until Michelle went back into your father's room. Then you crept slowly up the steps, skipping the bum one at the top that always creaks. Peering around the corner of the door, your fourteen-year-old self stifled a gasp: Michelle was kneeling on a pillow and had her mouth and looking up at your father, also without a stitch of clothing on. His dick stood straight up. Her back was turned to you, so you couldn't see her face, but her voice dripped with subservience: "Please, Master. Let me take your big, hard cock inside my mouth. Let me taste you and swallow your seed." You had found yourself getting wet, and without noticing you even stuck your hand into your jeans and started touching yourself.

Your father had replied, "By all means, slut." And Michelle ran her tongue up the length of his shaft before swallowing him. It was the most erotic thing fourteen-year-old you had seen up to that point. Afterwards, you had spent hours searching for similar porn online and watching it hungrily. When you masturbated, you fantasized about getting to suck a cock that nice. You got yourself off imagining your father as the owner of that cock, his hands gently pushing your head down and forcing you to take him deeper into your throat. The phase lasted for nearly a year--slightly longer than Michelle--and then you grew out of it, disgusted with yourself. Since then, you have never had any stray thoughts about your father.

Clearly he has them about you, though. And so you move into a crouch and took him into your mouth. You do exactly what he suggested and employ every bit of experience gained during your first year away at college. Your father must have been well pleased, because you could feel his cock straining to get bigger. As his hand comesto rest on your head, just like you had imagined all those years ago, you feel yourself shudder with a surge of unexpected pleasure. It is all you have desired, and more.

He doesn't let you make him cum, though, and interrupts your careful ministrations. "That's a good girl, but it's Christina's turn for some fun now."

You look over to the doorway of your father's bedroom. Christina stands there, wearing a dramatically different costume. In place of bikini, blouse, and skirt she now sports a black, lacey teddy that cleaves closely to her body. It provides full coverage of her breasts but offers tantalizing glimpses of them beneath shimmering lace before dipping down towards her crotch, leaving her midriff completely bare. The teddy itself is crotchless, though, for easy access. Christina has added a garter belt and thigh-high black stockings, complete with black stiletto heels. You've seen her kitted out in slut mode before, but never quite so ... high-class hooker. But on her slim build, it works well.

Christina approaches you, arms clasped behind her. When she reaches you, she reveals what she's holding: a bright pink dildo, far larger than your father's cock, already lubed and ready to go.

Your father takes a seat on the couch to watch the show. Christina wastes no time pushing you back on all fours and spreading your pussy lips apart. You feel the tip of the dildo brush against your nether regions. "Mmm," you manage despite the collar.

"Puppy likes her new toy?" Christina asks. "Puppy wants more?" Christina slowly slides the dildo down and into your pussy. "Come on, puppy. Give me a nice doggy growl. Tell me you want it."

You push your ass up, eagerly taking more of the toy inside you. Christina slaps your ass several times until it stings. "I still can't hear you."

You give in. It's too much. You growl softly.

Christina stops. "Now, now. You can do better than that."

You growl a little more strongly, and add in a light-hearted, "Woof!"

"Much better." The fucking resumes.

You look over your shoulder, taking in the scene. Your father is staring at the two of you from the couch, one hand on his cock and the other propping up his head. Christina is kneeling next to you. She controls the dildo with her left hand as she uses the right to rub and spank your ass.

From his vantage point over on the couch, your father calls out, "Here, catch." He tosses something lightly, and Christina lets go of the dildo to catch it with both hands. It's some kind of harness or strap--oh. Christina fastens it around her waist, then she yanks the dildo from your pussy. She rubs it against both of your ass cheeks and then attaches it to the strap.

She shifts position, crouching behind you so that the dildo, now a strap-on, is poised for penetration. She takes firm hold of your waist. Noticing that you're still watching with interest, she takes one hand off for a moment and uses it to push your head down and your face into the floor. "Be a good bitch now and submit, Ally."

You had never known Christina had a hidden domme side! You brace yourself as she thrusts the strap-on into your primed pussy. Her lack of experience in this area is compensated for by the fact that, unlike the other dicks that have fucked you, this one isn't interested in cumming. She starts off agonizingly slow, so slow that you wonder if you'll have to beg her to go faster. After all the foreplay and dildo-fucking, you're ready to cum.

Christina seems to sense this. She leans forward a bit more, really pressing the upper half of your body against the ground. Her hands rub against your ass, your tits, and she kisses your neck and shoulders, giving you playful nips. "You know," she whispers in your ear, "you really are such a bitch, Ally. You're much nicer this way." You can only growl in reply.

Christina nudges you slightly to the right, angling herself and your body in such a way as to give your father a better view of the action. You're panting and gasping now like a real bitch in heat, thrusting your rear back against the dildo each time Christina thrusts it forward.

You tremble. Your paws curl reflexively and your knees buckle. You lie prone to the floor as your orgasm washes over you. Lost to the waves of pleasure wracking your body, you can't even muster a satisfied sound for your audience. You just lie there, panting heavily, a smile on your face.

"Good dog," Christina says. She pulls out, then grabs you by the hair. "Now clean up your mess." She guides your head towards the dildo and thrusts the entire length into your mouth.

"Mmmph!" you gag. It pulls out. Without the use of your hands, it's hard for you to control it. You resort simply to licking your juices off the toy. Christina isn't satisfied until you've cleaned the entire length. Finally, stands up and pets your head.

She undoes the dildo and lets it fall to the floor. "Looks like you've got your first chew toy." She kicks it over to you before turning and joining your father on the couch.

You bend over and pick up the dildo in your mouth like it's a particularly thick stick. To your left, you hear a squeal of pleasure as your father flips Christina over so she can take blow him while he sits on the couch and licks her pussy.

For the next hour you're **** to watch your father fuck your best friend in numerous and varied ways. Eventually they retire to the bedroom, but not before your father refills your water and food bowls and sets up your bed. He also lets you out to relieve yourself. Yes, you get to sleep inside tonight--though this proves to be a mixed blessing, because you can hear Christina and your father fuck through the thin interior walls.

So this is your life as a dog, at least for now. Part of you is strangely at peace with it. You even liked the walk and fetching earlier, and there's no point pretending that you anything but enjoyed what just happened between you and Christina. Life as your father's doggy bitch is not that hard or demanding, and if you continue to play along like you have so far, you anticipate more "rewards" like tonight.

On the other hand, your father is fucking treating you like a dog without your consent. He deserves to be locked up; it's not like you deserve this treatment, especially just for making out with Christina in front of someone! Giving in or playing along is just going to make him think that this type of punishment will work on you again.

You have two weeks. How you choose to behave will determine what happens when the three of you leave the island and go back to civilization.