You say yes

You grin, “OK, you convinced me. My first command decision is to allow you to wake me up by sucking my cock.”

“See, I knew I’d like having you in charge, Stretch,” Abbie giggles. She kisses you again, then slips out of your bed and goes back to her room.

The next morning you wake to the sensation of a hand gently pulling your morning wood out of your boxers, then a soft, wet tongue slowly lapping over and swirling around the head of your cock. You draw in a deep breath and let out a long sigh of satisfaction. You hand moves to Abbie’s head. Your fingers comb through her soft, silky hair. “Mmmmmmmm… g’morning, Sis,” you say lazily.

Abbie gives your cock another long lick. “Good morning, brother. Master,” she answers softly, with her soft lips pressed against the underside of your shaft. Her voice is slightly muffled by the blanket she’s under.

You open your eyes and pull back the covers to see your sister slowly, gently, almost reverently kissing and licking the head of your cock, while her hand strokes in an easy rhythm up and down on your shaft. She’s focused fully on your cock, paying attention to every time it twitches, flexes, or throbs. She repeats the touches of her lips and tongue that get the most response.

You glance at your phone and see you have 10 minutes before your alarm is set to go off. You turn the alarm off. “Damn Abs, this is sooo fucking good,” you groan low, “I can’t last much longer.”

That makes her smile a mischievous little grin. She wraps her lips around the very tip of your cock and suckles softly. The tip of her tongue teases along the pee hole. Her hand strokes faster, gripping a bit tighter on the down-strokes. “Ohhhh, gimme, brwo. I wan’ i’,” she moans, her words distorted by the cock head between her lips.

You grip the sheet under you with both hands and tense your legs to avoid bucking your hips up. Your cock pulses and jets your cum into your sister’s eager mouth.

Abbie holds still, letting the load fill her mouth, then milks the last dribbles from your cock with firm upstrokes along your shaft. When she is satisfied that she has it all, she gulps it down. Then she nuzzles your softening shaft, dragging one cheek up along it, then the other. “Thank you, Master,” she murmurs softly.

“Shouldn’t I be thanking you? That was amazing,” you laugh.

Abbie lifts her face from your cock, to smile at you. “You can if you like, but I feel like I have to tell you how grateful I am. How wonderful it feels for me when you cum and I know that I pleased you.”

You stroke Abbie’s hair. “You have no idea how much you pleased me,” you tell her. “You’re incredible.”

Abbie presses her head into your stroking hand like a cat. “Thank you, Master.” Then she bends her head back down to kiss your cock and balls gently.

“Damn, I wish we could just stay here all day like this,” you sigh. “But, I have to go to school; you’ve got a final to take; and it would be a lot to explain to Mom.” You grin and give Abbie’s hair a playful tug.

Abbie moans at the feeling of the pull on her scalp. She lifts herself slowly away from your cock. “I know. When I get a real job, I’ll get an apartment near the college. That way we can tell Mom it makes sense for you to move in with me, for a shorter commute. Then we’ll have days when we can laze around naked and fuck all day.”

“Until then, we’ve got a few minutes every morning, and afternoons when Mom’s at work.” Abbie leans over and kisses you on the mouth. Her hand strokes over your chest. “I can get a little more sleep now. My final doesn’t start for a while. Have a wonderful day at school.” She gets up and heads back to her room. You watch her firm round ass swaying as she walks away.

You do have a great at school that day. You aren’t as anxious around girls. You don’t care so much about what they think of you, knowing you have a girl at home who’s sexier than any of them and wants to be your ****.

You get a few texts from Abbie throughout the morning. The first is a close-up picture of her pussy, with two of her fingers pressed into it, along with the message, ‘Thinking of you.’ You nervously look over your shoulder to see if anyone is behind you who could have seen. Luckily, no one is nearby. After that, you make sure that you have privacy when you check messages from your sister. None of the other texts are pictures, though; they are links to websites. You decide not to click on those until you’re home.

When get home, Abbie is still out. Her final must be going on into the afternoon. With some time to kill, you check out the links Abbie sent. They take you to a couple of blogs and discussion groups on Fetlife about Master/**** relationships. Your sister is making it clear that she wants to be your ****.