There's no point in restraining her.

"So…are we done? Please tell me we're done."
Setsuna pondered for a moment. "…sure, it's about time. Now get off me."
"No."
"What the hell do you mean, 'no'?"
"'cause you'll kill me the moment I get off."
"True, but I can kill you even like this, too."
"You can?"
The tip of a black fox tail made itself known by poking Naruto's back through his clothes.
"Ah. The tails. Right."
"Right."
"So what was the point of me restraining your body like this?"
"Beats me. Now, get off."