"Wow, this is so cool!" Emily chirped, squirming and wiggling excitedly on Emma's couch. "It's all, like, you know... So sciency and stuff!"

"Yeah, you've already said that about a hundred times, sis..." Emma mumbled, tightening the belt of her fluffy white bathrobe as she glanced to her side at Emily with a mix of perplexity and big-sisterly worry.

Emily was wearing only a skimpy silk robe that barely hid her breasts and groin, while leaving most of her huge round bubble-butt exposed. Even though Emily had reacted with enthusiasm when she had told her about Dr Jung's research, Emma doubted that her ditzy little sister fully realized what she...