Indeed. Mated pairs mark each other. Sesshomaru is well-aware that they have made no such pact. However that doesn't mean he can't nibble and drive himself into her powerfully. She is like silk and velvet, sliding across his aching cock and he lets himself be greedy. Growling, he grabs her hips and then reaches between her legs to tease her clit again. The taste of her is still on his tongue and his senses are in a frenzy; so much so that he loses his perfect rhythm, his eyes lidded as he approaches the edge.