Her sister

Exiting the room, the two of you almost bump into her sister, Nicky, who's just coming out of the bathroom. "Fuck, you two, could you have been any louder!?" she asks in an annoyed tone. "It would have been nice to sleep in a little. I didn't get in until late last night you know."

Nicky is Tia's younger sister, home after finishing her freshman year of college. Seeing she's been away, you haven't spent much time together, but Tia is very close with her and talks about her so much you feel like you know her well. She's only 19 years old, and a little shorter than her sister at 5'4". Where Tia has blonde hair and blue eyes, Nicky's coloring is slightly darker, with hazel eyes and auburn hair, and her nose is a little longer and thinner. Right now, she has her hair up and is wearing a white, terrycloth bathrobe that hides her figure, but you know from seeing her recently that she's managed to avoid packing on the freshman fifteen and still has her tight, teenage body,with flat stomach, athletic legs, and perky C-cup titties. She looks good, and though you've just cum less than ten minutes ago, you feel your cock stir at the site of her.

"Sorry sis," Tia replies, laughing. "but I've got needs you know. And once I get David's big, hard, dick inside me" she says while grabbing hold of your package, "I just can't control myself."

Tia giggles then makes her way towards the kitchen. You move to follow, but Nicky is slightly in your way and you have to scoot sideways to get past her. As you do so, you could swear you see her eyes glance down at your crotch and see her lick her lips, but before you can confirm your suspicion, she's already turned to go into her room. You take a second to admire the view of her firm ass peaking out from the bottom of her bathrobe as she walks away from you, before joining Tia in the kitchen.

Entering the kitchen, you see Tia up on her tiptoes reaching for some mugs, the coffee maker already out on the counter. You grab the coffee from the pantry and creamer from the refrigerator then join her at the counter to help her start a pot of coffee.

Once finished, Tia pours each of you a mug then calls out to her sister. "Nicky! I made coffee!". She holds out a mug to her sister who walks into the kitchen shortly after. "Here, a peace offering for waking you up."

Nicky smiles at her sister and takes the mug, sipping the hot liquid and letting the caffeine enter her system. "Thanks Tia, but don't think I'm letting you off just for a cup of coffee. I'll get you back." she threatens, but without any hint of malice in her smile.

Tia takes another sip of her coffee then glances at her phone to check the time. "Shit, I gotta get going to work. If I don't leave now, I'm gonna be late." She leaves her half full mug on the island counter top and grabs her keys from a hook on the wall before coming over to kiss you one more time. Placing her hand against your chest, she leans forward, pressing her lips to yours and touching the tip of her tongue to yours. "Thanks for coming over." she says as she pulls away from your embrace. "Stay and finish your coffee. Maybe if I get out early today, we can have a repeat of this morning?"

"Mmmm, I like that idea." you reply, grabbing hold of her supple ass cheek. "Send me a text when you know what time your shift will end."

Tia assures you she will and gives you one more quick peck on the lips before leaving for work. Hearing the front door close, you take another sip of coffee then turn to face Nicky. "Hey Nicky, I'm sorry about earlier. Tia didn't tell me you were here. I would have tried to be quieter if I had known." you say, apologizing.

She gives you an easy smile that immediately relaxes you. "Oh don't worry David. I'm not mad at you guys. I'd be lying if I said I hadn't done the same thing to my roommates before. I guess there's just something about us Allen girls. When we start fucking, we just can't control ourselves.".

Well, you weren't expecting that comment to come out of Nicky's mouth and you're unable to stop from picturing her moaning in ecstasy and begging for cock while getting fucked from behind, like you just did to her sister.

Your thoughts are interrupted as she continues. "To be honest with you, it actually turned me on quite a bit. " she says, moving towards you. "I couldn't help it and had to finger myself while I listened to you two go at it."

In the few seconds it took for what she said to register in your head, Nicky has managed to close the distance between you and is now standing directly in front of you. The faint scent of citrus from her body lotion hits your nostrils and the look in her eyes hints that she may have more on her mind than just fingering herself.