I wish I knew what was being said but it is still pretty funny.

My guess is that when Rin dropped her towel she was expecting them to go all wolf eyed over her body.

But it looks like they were unaffected by her womanly (or lack thereoff) charms and were kicked out for it.

I'm more curious about why Rin's so certain that the other two are virgins.

I'm more curious about why Rin wanted her own brother to perv on her.

Yet she got scorned in return.
That's why both Len and Kaito got the GTFO.