"Glad to hear~ Now, let me make you feel even better~" Frisk says as she kisses down to your bared breasts, taking both into her hands as she begins to kiss and softly nibble at your sensitive tit flesh, rubbing her hips against your own as pleasure arced through you.
She lets out a pleased hum as you grab her hair, smirking as she takes a nipple into her mouth and suckles on it, grazing her teeth against it for added fun.
Soon she gave your other nipple the same treatment, kneading your soft titflesh and humming before she began to kiss and shimmy down... making her way for your slit.
She moves down... and soon enough, you feel her blowing her tongue on your clit and it feels so wonderful... but it feels even better when she starts sucking on it and lapping at it with her tongue.
Frisk looks up at you with a mischievous glint in her eyes as she brings a finger up together some of your honey that is leaking forth from your slit. She teases and titillates your folds even as she is getting her finger nicely lubed up for the real surprise as she glides it back down and gently begins pressing against your back door.
Frisk smirks at that, giggling a little as she pulled back for a moment… Only for you to find her own hips swinging around to hover over your face as she presented her own petals for you to taste and enjoy as she got right back into pleasing your own virgin folds.
"Hehe, mhm, well time to find your sweet spots~" Frisk says with a giggle as she dives her tongue back into your folds as her finger keeps slowly pumping in and out of your ass.
Playing you like a fine instrument, Frisk soon sits up and grinds her slit into your face as she says "Hey little sis, your doing more moaning then helping to get me off too~ I want us to cum together~!"
Frisk doesn't seem to mind, more amused and enjoying teasing and playing with you as you get more and more of her own taste... fuck your new sister is so amazing, you never would have imagined you'd be doing this with Frisk before!