Heather needs to finish.

“Thank you so much. That was incredible,” you tell Heather as her head appears next to you. Her hair is messed up from moving around beneath the sheets and her breathing is elevated.

“That’s great but you need to finish what you started on me,” she tells you urgently.

Heather must have been close to orgasming when you came yourself. She reaches over to your right and dominant arm, grabbing your hand again and pulling it back to her pussy.

“Use two fingers this time,” she tells you as you get the tips of your hand coated in her slick juices before starting to insert the pair of them into her this time.

Heather’s hands grab onto your arm and you can feel her sharp nails digging into your skin as you start to finger her again. She moans in need desperately before bringing her mouth in contact with yours. You are surprised and aroused again as your sister’s tongue invades your mouth. You can taste the after effect of your own semen in her mouth as she kisses you passionately, working herself into a frenzy as you thrust your two fingers into her pussy rhythmically and forcefully.

Heather throws back the covers over her chest and pulls the straps down her little nightie urgently. Freeing her breasts to you.

“Suck them,” she begs as you do as she commands.

Your lips close around the hard, little nub of her erect nipple as her pussy begins to pulse and squeeze your fingers. Your two digits **** together as you bring your sister to orgasm through your manipulations. You keep your fingers as deep inside Heather pussy as you can and press them firmly to her as she cums on your hand. Your mouth stays attached to her pert tit as you suck and fingerfuck Heather through her orgasm. You’d be lying to yourself if your ego didn’t inflate more than a little at the thought of having just made your first girl cum, especially after not being able to with Rebecca this morning.

After a few moments, Heather pushes your hand away from her pussy, your fingers coming out damp and greasy in her girl cum. “It’s too sensitive,” she informs you as she turns to you and hugs herself tight again you. Your arms extend around her back and your thigh nestles between hers as you cling to each other in bed. Your erection returned by the eroticness of what just happened and the fact that you are an eighteen-year-old guy with a sex drive to match.

“You recover fast,” Heather tells you as she feels your erection pressing back into you. Your boxers covering your shaft, Heather grinds her hips against you. You take a hold of her naked arse cheek in order to get better leverage to grind against each other, dry humping your sister freely.

“Careful with that thing. You can’t go inside me,” Heather tells you as you press the tip of your cock firmly against her pussy in one of your thrusts. The cotton material of your boxers the only thing that just prevented your dick from slipping more than a millimetre between your sister pussy lips.

“God! If you weren’t my brother, I’d make you fuck me right now,” Heather says. Want, need and desire written all over her face along with regret at what can’t happen.