No. You are in a POSITION of teacher, even if you arent technically a teacher. During the class you were in a position of power and responsibility.

It's a summer camp for teenagers. You have a parental responsibility. That includes not seducing a student. College professors have students over the age of 18, it is still against policy.

Its the same reasoning behind drs and their patients, or church clergy and members. Its a power position and therefore unequal and creepy.