She'll play the "little sister" while in-house.

After thinking about it for a bit while Melanie attended to her actual daughter, Gemma hums. Although there is some uncertainty in her eyes, she gazes at you, willing to play along in order to please her new boyfriend.

"I don't mind playing a role in the family when we're at home," she finally offers and then frowns, "...but why should I be the little sister? Aren't we the same age?"

You raise an eyebrow. "Actually, I never did ask. I assumed you're at least my age: 21."

Gemma widens her eyes, shocked by your assumption. Suddenly Erica starts to chuckle. Knowing her well, she offers you her true age. "She's actually 23. Not that far from us, but still...she's actually the oldest and was a year ahead of me in high school."

You let out a slightly surprised hum from your mouth as Erica explains. This only causes the short girl to lower her head, embarrassed. "T-that's...shouldn't I be the eldest then?"

Before you could open your mouth, Erica snickers, unable to grow more amused by her friend's reaction. You get the feeling that Erica had a habit of teasing Gemma a lot in the past, yet it appears that the police girl is used to your cousin's antics.

"Come on girl, you should take that as a compliment! Why would you want to be the eldest, huh? As the 'little sister', don't you want to be spoiled more?"

Gemma furrows her eyebrows cutely as she becomes conflicted. "I mean...I never meant to be spoiled or anything. You guys are only saying that because I'm short, right?"

You are unable to help draw close to her as you chuckle. Nuzzling your head towards her, you find yourself holding her tightly. She doesn't resist your advance and only stares, awaiting your answer.

"To be honest, yes," you admit without a shred of guilt, "...but I wouldn't have it any other way."

Gemma stares blankly at you for a moment, then sighs. "Nobody ever takes me seriously..."

You chuckle, taking her response to accepting her role as his little sister within the family. Of course, above all else, she's still your girlfriend, but being her fake brother would no doubt add some more spice to this strange family life. Not wanting to get lost in thought of the possibilities for too long, you lean further down to kiss the police girl which she returns immediately. It's as if she's already gotten used to kissing you like it's the most normal thing in the world!

Breaking away after a couple of pecks, Gemma smiles warmly towards you. "You're so sweet, big brother."

Widening your eyes, you feel shivers down your spine and Erica can't help but slowly grin at your reaction. "Let's not forget about me, little bro, I've got to take care of you too."

Being pulled towards Erica now, the moment you turn to face her, she locks lips with you immediately and hums in your mouth. Unlike the sweet kiss of Gemma, Erica doesn't pull any punches as you feel her tongue interlocking with yours. Saliva drips down and you feel yourself growing instantly hard. You try to keep up with her as much as you can, but find yourself thoroughly impressed. Of course, she isn't your slut for nothing. Who knows how much that title translates into experience!

Gemma widens her eyes to see such a scene and now becomes a little jealous, yet she holds herself knowing that Erica is your personal slut and your actual cousin. Naturally, as the eldest sister, she would have more initiative.

Finally pulling away, Erica takes a deep breath and then places her hand on your leg, ever so close to your crotch which somehow, she knows that you've grown a hard-on. You shiver this time at her touch as she whispers in your ear.

"Now my little brother, I hope you don't forget about me too," she sings causing you to take a shaky breath.

Holy shit.

"Alright, I'm back! Sorry about that. I know we have important guests here with us," Melanie comes down from upstairs. Between the conversation with Erica and Gemma, you didn't even notice that the crying of Hannah had stopped.

You smile to your mother who is incredibly bright and cheery. Not wanting to stare at her chest which is sticking out quite nicely in her casual clothes, you clear your throat.

"First off, sorry for bringing some people suddenly mommy," you apologized, keeping true to the way you want to address her.

Melanie waves dismissively and chuckles as she stares at the two girls by your side. Sitting down on a side couch so she could fully view the two new girls in her house, she reassured her "son".

"It's no problem, baby. You said you wanted them to live here, right? I'm sure your father will agree to that arrangement. We have more than enough rooms after all."

Seeing how well Melanie is accommodating, you realize that you may not have to arrange some silly reason for her to claim Erica and Gemma as her daughters. Perhaps being upfront about them would be sufficient?