No.

"Zoe... please." Your tone is firm, and a little sad. "I know that our family history has been strange, and role models of decent behavior were in short supply, but you have to cut this out." You smile at her. "I love that we can be playful together, and joke and push the envelope, but there's a line. We can't cross it. And peeping on me and Jenna is crossing it."
Zoe sits up, pouting. "Why do you have to be a buzzkill?"
"Zo, come on. What do you really want? What's the endgame here? Am I really going to bang my sister?" You shudder.
"...no... I guess not."
"Does that really disappoint you?" You look at her with concern.
"I can't help it if you're still a stud in your silver years, Jimmy."
"Sil... thanks a lot, Zoe, I'm only 38."
"I just said that to wind you up..." she sticks her tongue out.
"Are you going to cut it out, then? I don't want this to be a problem..."
"Fine." She flounces over to her duffel bag, pulling out a razor and some shaving cream. "I need to shower and shave my legs. Go to your little golf game." She sounds genuinely put out! Damn, she really does want to fuck you, you think.
"I'll see you later, Zo."
You try not to think about fucking Zoe as you pack your golf clubs into the Javelin and head to the course.