Keep Going

"Now we move into Standing Backbend," the teacher explained, lifting her torso upwards and thrusting her hips forward.

You chuckle to yourself, watching with the man as the Curvy Redhead follows the teachers example, rising upwards and as she does you add to the rip of her pants. As soon as she reaches full height, thrusting forwards they completely snap, suddenly pooling down around her knees, her panties on full display to the pair of you.

The man however has his own problems, standing upright and thrusting forwards has his clear erection pointing directly towards the Redhead's arse, unable to tear his eyes from the woman's panties.