He smiled with a little too much self satisfaction when he hear her groan, inordinately pleased with himself and knowing how silly it was, but there was a small part of him that would always be bewildered with the fact that Astrid was with him and be pleased when he could bring her pleasure, however briefly and sometimes only with assistance, but pleasure nonetheless.
When she parted her legs wider, he shifted a bit to better support himself before he moved to guide himself to her entrance, closing his eyes and hissing out a groan as he felt himself slipping inside of her, burying his head against her neck and shoulder and pressing a series of soft kisses there.
He gave them both a moment to adjust to the sudden movement before he started into a rhythm, letting her encouragements dictate how fast he moved.