That's okay; Tetsuma's mostly focusing on a) playing, and b) helping Dayo get better, turning mistakes into learning moments instead of openings and dialing down the speed. When she notices genjutsu she doesn't jump straight to disrupting her chakra, instead breaking it by looking for flaws. (Like, Dayo's probably not remembering to mask sounds super well, and shadows are tricky.) She doesn't use her wood or earth manipulation, to avoid violating the 'leave the landscape alone' rule.
(Tetsuma's having fun, especially with the restrictions - it adds a nice layer of challenge.)
She's decided to try directly pinning her girlfriend, so as long as Dayo's good at being slippery she'll probably stay ahead of Tetsuma for a bit.