Greg noted Theo rubbing his hand on his stomach and it made him concerned. This not eating thing was going to have to get resolved; Theo was already far too thin in his arms as far as he was concerned.
But the man-boy in his arms was pursing his mouth for a kiss and Greg was not going to ignore the chance to kiss him. He lowered his mouth to his lover's lips and at first he kissed the side of Theo's mouth and then the other, trying to encourage Theo to relax. When it seemed like Theo softened, Greg let his lips brush against Theo's, gently kissing his mouth lightly and then pulling back, to move in again and kiss him a bit longer. He kept this small short kissing up, wanting to pull that love out of Theo if he could.