As the group enjoys spending more time at the beach, Nyarko has become even clingier to Mahiro.  Enough is enough, four words from Mahiro breaks Nyarko spirits causing her sanity level to drop rapidly.
You've skipped way past that.
¡No, te adelantaste demasiado! 
¡Te equivocaste con los pasos!
¡No, te adelantas demasiado! ¡Ni siquiera deberías seguir eso!
Você passou muito além disso.