Welp, I was wrong about the Little Empress' swimming abilities. Apparently, almost drowning once had not motivated her enough to learn to swim. Let's see if the second time is the charm. ^^
She's so fast at thinking on her feet, with that "stay back, go get the general instead" line.
Especially since she does not know who else knows about the Emperor's sex. But she must have figured out that if someone knows it, it must be Tantai Lan.