Watching the whole scene in front of her Shizuka had  but to smile. She the make-out session between the two students was getting her full hard underneath her own uniform skirt. She couldn't help herself on this one as she reached under her skirt, pulled her member out and then began to stroke it to the blowjob that was going on in the front of the classroom. "Mmm now that is hot." she murmured as she raised her hand while stroking her cock. "Mmm hey teach if we are suppose to have sex during the play then shouldn't we rehearse the orgy scenes as well?" she asked her with a grin on her face. To say she wasn't shy about sex was an understatment. Heck if Shizuka could have gotton away with it she would have come to class in nother but a pair of socks and shoes.