Nate knew how Lucien got after they had sex, which is why he always tried to offer comfort and love and reassurance through his touch. He never wanted Lucien to let negative thoughts invade their bed so hebtried hard to keep them at bay.
"I love you too and it's that love that helps tell me what you need. I'll always give you whst you need as long as it's in my power to do so" he promised with a smile.