After giving Yang a quick kiss on the cheek and putting her robe back on before exiting the forge hoping to sneak back into her room unnoticed This was a failed attempt for Kat had woke up shortly after she'd left yet he figured she was just running to get breakfast so he showered off and got changed. It was at that point that he realized she had been gone for too long and thus figured it was time for him to search for her.
Now just as he opened the door to her surprise Rebekah was standing there in her robe. This caused him to raise an eyebrow at the fact she went parading through the whole compound in just her robe for he could easily tell that she wasn't wearing anything. Out of curiosity he sniffed the air to pick up a mixture of scents from, the fires of the forge, to a ball room, with a hint of battle and sex.
"Is there something you wish to tell me?" asked Kat with a raised eyebrow.