Spock rose an eyebrow. He wasn't going to bother with a young man who obviously wasn't in a clear state of mind. His comments didn't phase him in the least. He was only worried about Irina who seemed to be effected emotionally by her cousins state.
"Are you alright?" he asked in Vulcan so that only she would understand. He calmed a little upon further examination of the young man's condition. Even if he became hostile, there wasn't much he could do. He didn't think he would need to use his gun but he kept it's presence the back of his mind.
"Do you need help bringing him home or to a Rehabilitation facility?" he continued to ask her feeling odd to be speaking his native tongue. Odd but happy, like he and Reena had some kind of special bond. Even though she was not Vulcan he could speak with her comfortably and privately in that way.