Isabelle wants to break out of the institute to hunt demons with Simon. Simon isn't sure that she is ready to go without Alec and Jace's backup. She thinks she is. To get to the demon nest, they have to climb over a wall, in wich the "you be on top"and "put your legs on both sides" comments come into play. In the end, Isabelle starts to loose her balence ("Simon! I'm going to-") and falls off the wall.
2. "You make it sound disgusting."
"Iiii ith"
"Sorry?"
"It is disgusting. I can't believe people enjoy this."
"I enjoy it"
"You're a boy. Of course you like this."
"That's kind of-"
"I honestly don't care."
"Well, finish. That's the best part. My favorite part."
"You are such a-"
"Just finish, Clary."
"If it makes you happy."
"It will."
"..."
"Just put it in your mouth."
"..."
"..."
"Done. God, that was so salty."
"Thank you for not wasting."
"I can't believe I just did that, Jace."
"You have to admit you kind of liked it."
"Whatever floats your boat, hun. Let's just go get some really food."