A simple way to get a warm, cozy look is to combine warm light with white-balance control.

One effective approach is to create warm/cool contrast: light the bed/subject with a warmer source, and keep the background slightly cooler. If you have two lights, bounce one off the gold reflector onto the bed to warm it up, and use the other more directly on the background. Even if the difference is subtle, it can help the bed feel inviting.

If you mainly want overall warmth, the easiest method is to shift white balance toward amber. You can do this in-camera by choosing a warmer white-balance setting or fine-tuning along the blue/amber axis, or later in post-processing. Deliberately using a slightly “wrong” warmer white balance is a common technique.

So: start with the gold reflector to warm the bed, keep another light less warm for separation, and adjust white balance warmer until the scene feels comfortable but not overly orange.