Yes but first....

You hesitate only for a moment before saying, "I suppose we could try it out... but only until Mom and Dad get home."

You see your see break out in a huge smile before asking, "Great, so are you ready?"

"Almost. First, I just want to take you up on your offer real quick," you say, standing up.

Your sister looks confused but she covers it up with a smirk and says, "Oh yeah?"

Moving closer you reach out and start to play with her breasts. "Yeah, you see, I know I give a good blowjob, but I've always heard you say that you're better at everything..."

"Well, not everything..." your sis says, reaching for you, pressing closer. "But some things," she says, dropping to her knees, "Some things I'm way better at." Before you can respond she drops her head onto your hard cock and starts bobbing like a pro. As you look down she meets your eyes and picks up the pace. After a moment you begin to stroke her hair like she did last night as she does her heavenly work. You relax as you feel the pressure and stress flow out of your body. As your sis goes deeper and faster you groan coming close to climax. With one last push you lose control and your cum spews forth into her mouth and she licks you clean. You fall back with a great sigh and bask in the post-orgasm glow for a moment, before you feel a soft body fall on top of yours.

"You're pretty good," you say.

"Oh yeah?" she says, relaxing into your body, arms around your shoulders and head lying on your chest.

"Yeah, but I think there's one more thing I need to try," you say.

"Now what woulMMM-" your sister starts to ask, before you flip her over and slide your head down between her smooth legs.

"Just this, let me know how you like it sis. After all, I learned from you." You plunge your tongue into her.

Based on the muffed sounds you could hear and the hand pressing your head into her, you're not half bad. You take what you learned and remember from last night and put it to use. Your sister arches into you as she climaxed.

As your sister lays back breathing heavily, you stand up and plop down on the bed next to her before saying, "You know, I think we can work something out". She grunts in approval as your curl into each other.