Jaylyn, I won't speak for Carla, but there are many reasons married couples sleep in separate rooms. Different schedules, comfort (I HATE a ceiling fan on me at night. Some people cant' sleep without it), temperature, covers, and the big one: snoring. There's a time for making whoopie, and a time for sleep.
Carla, I'm not sure her reaction (or absence of one) was an indication of acceptance. It may have been overlooked or ignored as she was just grateful that you responded to an urgent situation so quickly. If she had reacted negatively, maybe the next time your response would be delayed a few minutes while you changed clothes.