"Phoenix, what's-?" No. Something was definitely not right with Phoenix, and Iosef was simply caught in the middle, unsure of whether it was his own fault in some way or not.
Hell, he didn't even know what to do or say, it wasn't like they knew each other well enough to figure these things out, which was pretty stupid since they were at ease enough to do other things. But not this. Not figuring out what to do in such a situation. He had no idea what exactly had ticked her off like this, so he didn't have much hope of fixing it.
Iosef simply sat there, pretty damn worried, and waited for her to feel better and come back. If she didn't, he'd just leave her a note and make a hasty exit, because then it'd be clear that she was probably better off alone for now.