Get Professor Phoebe to help

"P-Professor Phoebe...." You huff out between ragged breaths, leaning back in your chair for some much needed rest. Luckily, Delilah seems to be needing it too. "We're both.... so tired. C-can you help? Just, rub us a little...."

Delilah lazily rolls her head over to glare at you again. But, she doesn't object. Professor Phoebe smiles and licks her lips. "Now, you two. The whole point of this exercise is for you both to increase your endurance!" She stands up from her desk, and walks around to the behind of your two chairs. As she continues to speak, she idly fondles one boob from each of you. "But since you asked so nicely...."

Dropping down into a crouch, your two pants crotches either side of her head, she takes one of you in each hand with a smile, and ever so gently starts rubbing and rolling the eggs around.

"I could push these inside you...." She presses the eggs gently against your entrances, and you both moan out. "I could focus my efforts...." Reducing the pressure, she elegantly rolls the eggs up and holds them over each of your clits, then quickly pull them back down. E-ee... a quick look over at Delilah's squinted eyes and pursed lips confirm that she was also milliseconds away from cumming there..... Professor Phoebe's really good.....

"I could rub your boobs, or strip -- with a body like mine, there's a good chance that'd get you both to cum in your pants even without the eggs. But for now, that should do it."

Before she walks back to her seat, she pats a boob from both of you with a smirk.