Just barely catching the murmured apology, Sirius brushed elbows with Remus, assuring him, "No need to be." Because really, apologising for holding hands? Was the most absurd thing he'd ever heard, and after living with James Potter and smoking Gillyweed, you heard a lot of absurd tripe.
He slung his arm across Remus's shoulders, because there was nothing too scandalous about it. "Pool," Sirius decided, steering the way there.