She actually manages a small, bleary smile. "So what made you decide to join up with Buffy? After everything else."

She can see that maybe he got in over his head, with Warren, but there would be lots of options other than becoming friends with the very people you hurt. And she isn't going to ask, but she wonders how he avoided Willow killing him, at her worst - Buffy said she'd killed Warren, but Tara knows Willow, and knows her potential for destruction.