Toward the end of the clip, she flinches. The guy then says something like " I don't recall you being ticklish". She responds, (with minimal reaction) "I didn't used to be".
As I said, it was quick (very quick). Blink, and you miss it.
Admittedly, it's not much. But how often do you see a scene like that on Star Trek anyway?
I was more intrigued by her suggestion that he try another position. I would have recommended flat on her back in four point bondage. But, that's just me.