Dusty shook her head in bewilderment and started to get dressed. But something was nagging her, something deep in her male memories, she knew that voice Ty had just used. Dustin knew it well. Until it finally clicked. Dusty's eyes lit up with ideas of teasing her brother and literally catching him with his pants down. Her female half was actually pretty disgusted by the male half's intentions, but at that moment her male half was stronger.
Dusty quickly finished getting dressed and ran out of the bathroom. She burst into Ty's room and yelled "What cha' looking at you little wank-" Then she saw it.
The entire wall between Ty's room and the bathroom was completely see through, like glass. She could see everything in there, including where she had been standing naked not even a minute ago. And she saw Ty, laying on his bed, dick in hand, facing the see through wall with a surprised look on his face.
Water from her still wet hair dripped onto her nose as she made the connection.
"You... you were... oh my god..." Was all that Dusty could muster.