I'll admit I'm not familiar with this actress/director but she's pretty and on the 4th question of this interview, she admits her feet are extremely ticklish;
https://starrymag.com/sonja-ohara-pee-sitting-down/
It's definitely more of a male thing, but I think women might be more open to it than we think. If a woman likes and trusts a partner, she might allow occasional tickling even if she claims to hate it.
No offense, but your sister sounds like a vindictive b**ch. However her opinion doesn't matter. How does your GF feel about it? Foot fetishes are so common with men, I'll bet if you told her she wouldn't even care
If her feet were sticking out, she wouldn't have to crawl under the desk, she'd simply have to kneel down. And if this was written by a TMFer then the ticklee probably would've loved it, and it would've led to more tickling
I've read this story before, and while I believe Rachel(the woman tickled) was overreacting, at the same time we need to realize that a lot of people hate being tickled and could even be traumatized by it.
A similar problem happened to me once at work. There was this fun flirty female...