@Vincentius while is not as obvious as a man, there are physical reactions too with women...
Also... wow, that was the best thing I've read in this kind of isekai stuff lately, that was so wholesome and cute and all kind of things together and I'M 1000% SURE SHE KNEW WHAT SHE WAS DOING!
@Serenata ... Did I not emphasize "visual" enough to make my meaning clear? I mean, in this scenario, an erection would be kinda hard to miss, while it'd be super easy to miss or misconstrue any of the much subtler signs of arousal in a woman.