There was absolutely nothing wrong with being in the middle in Galen's mind. It gave one a wider choice of options and more free will to decide who to side with depending on the circumstances. After all, Gaia wasn't an evil woman. He could sense that about her. But she had a debt that needed repaying to Moriarty and had done so. He found that honorable.
Hearing her giggle, he smirked a bit, feeling a bit pleased with himself. Hearing and sensing her respond to his touches, he smiled as they were pressed together. Her question made him pause to consider her words. While taking her against the wall was more than enjoyable, he preferred the bed. There was a greater range of options on how to please her.
Smirking lustfully, he suddenly scooped her up and tossed her on her bed, following her a moment later and pinning her down. "I could tell you..." He gave her his own sultry smirk, a hand slipping down to tease her. "I could just do it and let you feel how I plan to fuck you."