He nodded, appreciating the out, and tried to ignore the complicated routine of backflips that it felt like his stomach was doing.
Once she started it helped a little. Ordinarily, Sam was fascinated by magic, especially having the opportunity to watch someone perform a ritual who actually had some ability and skill - unlike when he performed them himself. Sure they worked okay but they never felt very 'magical' to him.
He didn't catch what she was doing as he did as she'd asked and turned to get the cloth, by the time he turned back the only clue that the blood section was over was the hint of red slowly fading to gold and the cut on her arm. She hadn't needed to hide it from him but the fact that she felt like she did stirred a warmth in his chest that put a stop to the churning in his stomach. In trying to protect him she had shown him what he'd struggled to see before. How he could have ever doubted this spell when she was the one performing it was beyond him now.
As she continued her chanting he moved behind her, gently wrapping the cut to her arm with the cloth. Before he moved away again he softly kissed the side of her neck, just once, not wanting to disrupt the spell anymore than he probably already had but he couldn't have fought that urge in that moment even if he'd tried.