Her response was all the encouragement he needed. Not that he doubted she liked him kissing her. She made that plain enough. But more than that, Kratos always waited for a sign that she was up for it. It was just in his nature not to press advances like these if they were not wanted. She'd yet to say no, though, so his hesitations were growing shorter and shorter each time.
This time, the second her hand curled into the fabric of his shirt, his own hands were moving. One curled around her back so completely that his fingers rested against the front of her ribcage. The other was moved down to slide against the curve of her bottom, lingering for just a moment to appreciate that sensation, until he moved his arm under her in order to lift Ninkasi onto her desk heedless of what might be in the way at that moment.
He was sure she could spare a few minutes of work for some fun.