stepbrother caught stepsister masturbating and she offered to fuck her in the ass

I didn't even hear you. I knocked so quietly.

Oh, yeah?

Yeah.

I think I saw something.

I don't know, I slept a little too well.

*****?

Mm-hmm.

Really?

Yeah.

I think you have something there.

Yeah.

Is it okay that you're sitting there?

What's this?

What's with the prank?

Well, my little song.

A song?

Yeah.

Fine.

Oh, like you're not masturbating.

Masturbate.

It happens.

You just don't close the door.

Well, I closed the door.

I didn't think you were here.

Well, how?

I was walking into the kitchen, and I saw the door open.

I thought you were standing there.

No, no.

I literally knocked.

Mm-hmm.

Did you like it?

No, no.

No?

I didn't like it.

What would I like?

You're my half-sister.

How could I like that?

How's that?

I was lying there, masturbating, naked, no panties.

Well, I don't know.

I see you're tense.

Tension?

Yeah.

No, no.

You're locked out of your pants.

It's so easy.

Yeah, well, yeah.

Why don't you show me?

What?

Well, your thing.

A grand?

You've got your own thing.

Yeah.

What, she doesn't satisfy you?

Well, it is, but it's just that he's on a permanent basis.

I want something new.

You want something new?

...