At that moment, Betty's mouth was sealed by Michael's kiss. If their mouths had been apart, Betty probably would have spoken up. I had thought that Betty would struggle violently upon opening her eyes, but instead, both she and Michael were eerily quiet.
However, Betty's gaze at Michael was stern and icy, a look perhaps unique to her role as a teacher. Although Michael was deeply infatuated with Betty, he harbored a genuine fear of her sternness.
Betty didn't struggle violently; instead, she fixed Michael with that severe stare. A violent struggle could have led to an accident, potentially ruining the mother-son relationship, so this silent warning seemed the best approach.
Unfortunately, it was forgotten that Michael was still a child, lacking the rationality and maturity of an adult, especially in the throes of adolescence. With the situation reaching a critical point, asking Michael to back down was nearly impossible.