"... Okay." There was a lack of trust but he felt it was warranted. Nervously, he held out his hand and gripped Sirius' cause he was already far gone. Sirius asked, he reacted and then he worked out how to feel later. It was part of being friend's with Sirius. "Why are we holding hands? Oh-- Oh God, no, are we going to dance?"

Okay, abort, not gonna happen - he tried to take his hand back. "Sirius, I can't dance! Are you mad?!"