The Dreamcatchers were an extension of Hecate and were her representatives in public. Thus, for Fourth Dream to be seen in such an embarrassing state, she felt like she had stained Hecate's image.
Of course, Fourth Dream also felt terrible about her own situation.
After all, she was a chaste and unwed maiden, and yet, she had been caught in such an embarrassing and depraved act. Even her most private places were seen by others.
Fourth Dream felt like her life had been ruined, and death was her only escape.
Swish~!
Just when Fourth Dream thought about killing herself, Vaan appeared by her side, undressed and in the nude. She was immediately surprised by his sudden approach and exposing appearance.
However, Vaan knew almost no shame.
Thus, he wasn't embarrassed to be in front of Fourth Dream in his birthday suit, especially when she and the other two Dreamcatchers had already spied on his intimate acts for days.